1251002525 has 24 divisors (see below), whose sum is σ = 1604421120. Its totient is φ = 967037760.

The previous prime is 1251002521. The next prime is 1251002527. The reversal of 1251002525 is 5252001521.

It is not a de Polignac number, because 1251002525 - 2² = 1251002521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1251002525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251002521) 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 23 ways as a sum of consecutive naturals, for example, 86087 + ... + 99563.

It is an arithmetic number, because the mean of its divisors is an integer number (66850880).

Almost surely, 2^1251002525 is an apocalyptic number.

It is an amenable number.

1251002525 is a deficient number, since it is larger than the sum of its proper divisors (353418595).

1251002525 is a wasteful number, since it uses less digits than its factorization.

1251002525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13613 (or 13608 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 1251002525 is about 35369.5140622542. The cubic root of 1251002525 is about 1077.5052513458.

The spelling of 1251002525 in words is "one billion, two hundred fifty-one million, two thousand, five hundred twenty-five".