1157073265 has 4 divisors (see below), whose sum is σ = 1388487924. Its totient is φ = 925658608.

The previous prime is 1157073221. The next prime is 1157073277. The reversal of 1157073265 is 5623707511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 498227041 + 658846224 = 22321^2 + 25668^2 .

It is a cyclic number.

It is not a de Polignac number, because 1157073265 - 2¹¹ = 1157071217 is a prime.

It is a super-3 number, since 3×1157073265³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian 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, 115707322 + ... + 115707331.

It is an arithmetic number, because the mean of its divisors is an integer number (347121981).

Almost surely, 2^1157073265 is an apocalyptic number.

It is an amenable number.

1157073265 is a deficient number, since it is larger than the sum of its proper divisors (231414659).

1157073265 is an equidigital number, since it uses as much as digits as its factorization.

1157073265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231414658.

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 1157073265 is about 34015.7796470991. The cubic root of 1157073265 is about 1049.8331601883.

The spelling of 1157073265 in words is "one billion, one hundred fifty-seven million, seventy-three thousand, two hundred sixty-five".