1225635450 has 192 divisors, whose sum is σ = 3431780352. Its totient is φ = 287481600.

The previous prime is 1225635443. The next prime is 1225635457. The reversal of 1225635450 is 545365221.

It is an interprime number because it is at equal distance from previous prime (1225635443) and next prime (1225635457).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1225635457) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3940795 + ... + 3941105.

It is an arithmetic number, because the mean of its divisors is an integer number (17873856).

Almost surely, 2^1225635450 is an apocalyptic number.

1225635450 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 1225635450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1715890176).

1225635450 is an abundant number, since it is smaller than the sum of its proper divisors (2206144902).

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

1225635450 is a wasteful number, since it uses less digits than its factorization.

1225635450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 1225635450 is about 35009.0766801982. The cubic root of 1225635450 is about 1070.1724617928.

The spelling of 1225635450 in words is "one billion, two hundred twenty-five million, six hundred thirty-five thousand, four hundred fifty".