1156115257 has 8 divisors (see below), whose sum is σ = 1264217472. Its totient is φ = 1048513200.

The previous prime is 1156115239. The next prime is 1156115269. The reversal of 1156115257 is 7525116511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1156115257 - 2¹⁵ = 1156082489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1156115297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120193 + ... + 129454.

It is an arithmetic number, because the mean of its divisors is an integer number (158027184).

Almost surely, 2^1156115257 is an apocalyptic number.

It is an amenable number.

1156115257 is a deficient number, since it is larger than the sum of its proper divisors (108102215).

1156115257 is a wasteful number, since it uses less digits than its factorization.

1156115257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250079.

The product of its digits is 10500, while the sum is 34.

The square root of 1156115257 is about 34001.6949136363. The cubic root of 1156115257 is about 1049.5433409530.

The spelling of 1156115257 in words is "one billion, one hundred fifty-six million, one hundred fifteen thousand, two hundred fifty-seven".