1156665025 has 24 divisors (see below), whose sum is σ = 1489261824. Its totient is φ = 890203200.

The previous prime is 1156665011. The next prime is 1156665043. The reversal of 1156665025 is 5205666511.

It is not a de Polignac number, because 1156665025 - 2⁷ = 1156664897 is a prime.

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, 129762 + ... + 138388.

It is an arithmetic number, because the mean of its divisors is an integer number (62052576).

Almost surely, 2^1156665025 is an apocalyptic number.

It is an amenable number.

1156665025 is a deficient number, since it is larger than the sum of its proper divisors (332596799).

1156665025 is a wasteful number, since it uses less digits than its factorization.

1156665025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8841 (or 8836 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 1156665025 is about 34009.7783732855. The cubic root of 1156665025 is about 1049.7096778596.

The spelling of 1156665025 in words is "one billion, one hundred fifty-six million, six hundred sixty-five thousand, twenty-five".