1251450625 has 20 divisors (see below), whose sum is σ = 1614283264. Its totient is φ = 968850000.

The previous prime is 1251450617. The next prime is 1251450647. The reversal of 1251450625 is 5260541521.

It is not a de Polignac number, because 1251450625 - 2³ = 1251450617 is a prime.

It is a super-2 number, since 2×1251450625² = 3132257333625781250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12921 + ... + 51670.

Almost surely, 2^1251450625 is an apocalyptic number.

It is an amenable number.

1251450625 is a deficient number, since it is larger than the sum of its proper divisors (362832639).

1251450625 is an frugal number, since it uses more digits than its factorization.

1251450625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64642 (or 64627 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 1251450625 is about 35375.8480463720. The cubic root of 1251450625 is about 1077.6338875013.

The spelling of 1251450625 in words is "one billion, two hundred fifty-one million, four hundred fifty thousand, six hundred twenty-five".