1252403520 has 112 divisors (see below), whose sum is σ = 3985979328. Its totient is φ = 333168640.

The previous prime is 1252403497. The next prime is 1252403527. The reversal of 1252403520 is 253042521.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252403527) by changing a digit.

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, 470032 + ... + 472688.

Almost surely, 2^1252403520 is an apocalyptic number.

1252403520 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 1252403520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1992989664).

1252403520 is an abundant number, since it is smaller than the sum of its proper divisors (2733575808).

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

1252403520 is a wasteful number, since it uses less digits than its factorization.

1252403520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3168 (or 3158 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 1252403520 is about 35389.3136412675. The cubic root of 1252403520 is about 1077.9073332134.

The spelling of 1252403520 in words is "one billion, two hundred fifty-two million, four hundred three thousand, five hundred twenty".