1251352531 has 16 divisors (see below), whose sum is σ = 1471125600. Its totient is φ = 1049368320.

The previous prime is 1251352517. The next prime is 1251352573. The reversal of 1251352531 is 1352531521.

It is not a de Polignac number, because 1251352531 - 2⁵ = 1251352499 is a prime.

It is a super-2 number, since 2×1251352531² = 3131766313680211922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1251352531.

It is not an unprimeable number, because it can be changed into a prime (1251353531) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 362791 + ... + 366223.

It is an arithmetic number, because the mean of its divisors is an integer number (91945350).

Almost surely, 2^1251352531 is an apocalyptic number.

1251352531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1251352531 is a deficient number, since it is larger than the sum of its proper divisors (219773069).

1251352531 is a wasteful number, since it uses less digits than its factorization.

1251352531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6006.

The product of its digits is 4500, while the sum is 28.

The square root of 1251352531 is about 35374.4615648069. The cubic root of 1251352531 is about 1077.6057302629.

The spelling of 1251352531 in words is "one billion, two hundred fifty-one million, three hundred fifty-two thousand, five hundred thirty-one".