1251400052 has 12 divisors (see below), whose sum is σ = 2502800160. Its totient is φ = 536314296.

The previous prime is 1251400027. The next prime is 1251400067. The reversal of 1251400052 is 2500041521.

1251400052 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1251399997 and 1251400033.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22346402 + ... + 22346457.

It is an arithmetic number, because the mean of its divisors is an integer number (208566680).

Almost surely, 2^1251400052 is an apocalyptic number.

It is an amenable number.

1251400052 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1251400052 is a wasteful number, since it uses less digits than its factorization.

1251400052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44692870 (or 44692868 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1251400052 is about 35375.1332435653. The cubic root of 1251400052 is about 1077.6193710375.

Adding to 1251400052 its reverse (2500041521), we get a palindrome (3751441573).

The spelling of 1251400052 in words is "one billion, two hundred fifty-one million, four hundred thousand, fifty-two".