1225242450 has 144 divisors (see below), whose sum is σ = 3524941056. Its totient is φ = 316094400.

The previous prime is 1225242449. The next prime is 1225242451. The reversal of 1225242450 is 542425221.

1225242450 is a `hidden beast` number, since 122 + 52 + 42 + 450 = 666.

It is an interprime number because it is at equal distance from previous prime (1225242449) and next prime (1225242451).

It is a super-2 number, since 2×1225242450² = 3002438122564005000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1225242451) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 375024 + ... + 378276.

Almost surely, 2^1225242450 is an apocalyptic number.

1225242450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225242450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1762470528).

1225242450 is an abundant number, since it is smaller than the sum of its proper divisors (2299698606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225242450 is a wasteful number, since it uses less digits than its factorization.

1225242450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3311 (or 3294 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 1225242450 is about 35003.4634000694. The cubic root of 1225242450 is about 1070.0580659670.

Adding to 1225242450 its reverse (542425221), we get a palindrome (1767667671).

The spelling of 1225242450 in words is "one billion, two hundred twenty-five million, two hundred forty-two thousand, four hundred fifty".