1252132440 has 64 divisors (see below), whose sum is σ = 4045356000. Its totient is φ = 308216832.

The previous prime is 1252132417. The next prime is 1252132457. The reversal of 1252132440 is 442312521.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1252132440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399765 + ... + 402884.

Almost surely, 2^1252132440 is an apocalyptic number.

1252132440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252132440 is an abundant number, since it is smaller than the sum of its proper divisors (2793223560).

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

1252132440 is a wasteful number, since it uses less digits than its factorization.

1252132440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802676 (or 802672 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1252132440 is about 35385.4834642682. The cubic root of 1252132440 is about 1077.8295573742.

Adding to 1252132440 its reverse (442312521), we get a palindrome (1694444961).

The spelling of 1252132440 in words is "one billion, two hundred fifty-two million, one hundred thirty-two thousand, four hundred forty".