1245432240 has 320 divisors, whose sum is σ = 4893436800. Its totient is φ = 288423936.

The previous prime is 1245432193. The next prime is 1245432241. The reversal of 1245432240 is 422345421.

It is a super-2 number, since 2×1245432240² = 3102202928862835200, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (1245432241) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 476056 + ... + 478664.

It is an arithmetic number, because the mean of its divisors is an integer number (15291990).

Almost surely, 2^1245432240 is an apocalyptic number.

1245432240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245432240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2446718400).

1245432240 is an abundant number, since it is smaller than the sum of its proper divisors (3648004560).

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

1245432240 is a wasteful number, since it uses less digits than its factorization.

1245432240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661 (or 2649 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 1245432240 is about 35290.6820563162. The cubic root of 1245432240 is about 1075.9036180903.

Adding to 1245432240 its reverse (422345421), we get a palindrome (1667777661).

The spelling of 1245432240 in words is "one billion, two hundred forty-five million, four hundred thirty-two thousand, two hundred forty".