1251525929 has 4 divisors (see below), whose sum is σ = 1251666900. Its totient is φ = 1251384960.

The previous prime is 1251525871. The next prime is 1251525937. The reversal of 1251525929 is 9295251521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 919302400 + 332223529 = 30320^2 + 18227^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251525929 - 2¹⁶ = 1251460393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251525829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56204 + ... + 75245.

It is an arithmetic number, because the mean of its divisors is an integer number (312916725).

Almost surely, 2^1251525929 is an apocalyptic number.

It is an amenable number.

1251525929 is a deficient number, since it is larger than the sum of its proper divisors (140971).

1251525929 is an equidigital number, since it uses as much as digits as its factorization.

1251525929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140970.

The product of its digits is 81000, while the sum is 41.

The square root of 1251525929 is about 35376.9123723368. The cubic root of 1251525929 is about 1077.6555020215.

The spelling of 1251525929 in words is "one billion, two hundred fifty-one million, five hundred twenty-five thousand, nine hundred twenty-nine".