1257880652 has 12 divisors (see below), whose sum is σ = 2515761360. Its totient is φ = 539091696.

The previous prime is 1257880651. The next prime is 1257880669. The reversal of 1257880652 is 2560887521.

1257880652 is an admirable number.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1257880651) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 22462127 + ... + 22462182.

It is an arithmetic number, because the mean of its divisors is an integer number (209646780).

Almost surely, 2^1257880652 is an apocalyptic number.

It is an amenable number.

1257880652 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.

1257880652 is a wasteful number, since it uses less digits than its factorization.

1257880652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44924320 (or 44924318 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 44.

The square root of 1257880652 is about 35466.6132017141. The cubic root of 1257880652 is about 1079.4763842654.

The spelling of 1257880652 in words is "one billion, two hundred fifty-seven million, eight hundred eighty thousand, six hundred fifty-two".