1252637500 has 72 divisors (see below), whose sum is σ = 2859754464. Its totient is φ = 479160000.

The previous prime is 1252637497. The next prime is 1252637521. The reversal of 1252637500 is 57362521.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 285322 + ... + 289678.

It is an arithmetic number, because the mean of its divisors is an integer number (39718812).

Almost surely, 2^1252637500 is an apocalyptic number.

1252637500 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 1252637500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1429877232).

1252637500 is an abundant number, since it is smaller than the sum of its proper divisors (1607116964).

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

1252637500 is an equidigital number, since it uses as much as digits as its factorization.

1252637500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4409 (or 4387 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 1252637500 is about 35392.6192870774. The cubic root of 1252637500 is about 1077.9744556302.

The spelling of 1252637500 in words is "one billion, two hundred fifty-two million, six hundred thirty-seven thousand, five hundred".