1251662525 has 12 divisors (see below), whose sum is σ = 1633749600. Its totient is φ = 948628080.

The previous prime is 1251662513. The next prime is 1251662539. The reversal of 1251662525 is 5252661521.

It is not a de Polignac number, because 1251662525 - 2¹⁶ = 1251596989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1317065 + ... + 1318014.

It is an arithmetic number, because the mean of its divisors is an integer number (136145800).

Almost surely, 2^1251662525 is an apocalyptic number.

It is an amenable number.

1251662525 is a deficient number, since it is larger than the sum of its proper divisors (382087075).

1251662525 is a wasteful number, since it uses less digits than its factorization.

1251662525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2635108 (or 2635103 counting only the distinct ones).

The product of its digits is 36000, while the sum is 35.

The square root of 1251662525 is about 35378.8429008073. The cubic root of 1251662525 is about 1077.6947069825.

The spelling of 1251662525 in words is "one billion, two hundred fifty-one million, six hundred sixty-two thousand, five hundred twenty-five".