1252511031 has 4 divisors (see below), whose sum is σ = 1670014712. Its totient is φ = 835007352.

The previous prime is 1252510991. The next prime is 1252511033. The reversal of 1252511031 is 1301152521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1301152521 = 3 ⋅433717507.

It is not a de Polignac number, because 1252511031 - 2⁶ = 1252510967 is a prime.

It is a super-2 number, since 2×1252511031² = 3137567765553365922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1252510989 and 1252511007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252511033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208751836 + ... + 208751841.

It is an arithmetic number, because the mean of its divisors is an integer number (417503678).

Almost surely, 2^1252511031 is an apocalyptic number.

1252511031 is a deficient number, since it is larger than the sum of its proper divisors (417503681).

1252511031 is an equidigital number, since it uses as much as digits as its factorization.

1252511031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417503680.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1252511031 is about 35390.8325841594. The cubic root of 1252511031 is about 1077.9381761959.

Adding to 1252511031 its reverse (1301152521), we get a palindrome (2553663552).

The spelling of 1252511031 in words is "one billion, two hundred fifty-two million, five hundred eleven thousand, thirty-one".