1251415125 has 24 divisors (see below), whose sum is σ = 2255886360. Its totient is φ = 667420800.

The previous prime is 1251415103. The next prime is 1251415133. The reversal of 1251415125 is 5215141521.

It is a happy number.

1251415125 is a `hidden beast` number, since 1 + 2 + 5 + 141 + 512 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 110124036 + 1141291089 = 10494^2 + 33783^2 .

It is not a de Polignac number, because 1251415125 - 2⁵ = 1251415093 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 555060 + ... + 557309.

It is an arithmetic number, because the mean of its divisors is an integer number (93995265).

Almost surely, 2^1251415125 is an apocalyptic number.

1251415125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1251415125 is a deficient number, since it is larger than the sum of its proper divisors (1004471235).

1251415125 is a wasteful number, since it uses less digits than its factorization.

1251415125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112390 (or 1112377 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The square root of 1251415125 is about 35375.3462880577. The cubic root of 1251415125 is about 1077.6236976293.

Adding to 1251415125 its reverse (5215141521), we get a palindrome (6466556646).

The spelling of 1251415125 in words is "one billion, two hundred fifty-one million, four hundred fifteen thousand, one hundred twenty-five".