1251830725 has 6 divisors (see below), whose sum is σ = 1552270130. Its totient is φ = 1001464560.

The previous prime is 1251830719. The next prime is 1251830753. The reversal of 1251830725 is 5270381521.

It can be written as a sum of positive squares in 3 ways, for example, as 217179169 + 1034651556 = 14737^2 + 32166^2 .

It is not a de Polignac number, because 1251830725 - 2⁵ = 1251830693 is a prime.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 25036590 + ... + 25036639.

Almost surely, 2^1251830725 is an apocalyptic number.

It is an amenable number.

1251830725 is a deficient number, since it is larger than the sum of its proper divisors (300439405).

1251830725 is an equidigital number, since it uses as much as digits as its factorization.

1251830725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50073239 (or 50073234 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 1251830725 is about 35381.2199478763. The cubic root of 1251830725 is about 1077.7429788149.

The spelling of 1251830725 in words is "one billion, two hundred fifty-one million, eight hundred thirty thousand, seven hundred twenty-five".