1156265157 has 4 divisors (see below), whose sum is σ = 1541686880. Its totient is φ = 770843436.

The previous prime is 1156265111. The next prime is 1156265161. The reversal of 1156265157 is 7515626511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1156265157 - 2¹⁴ = 1156248773 is a prime.

It is a super-2 number, since 2×1156265157² = 2673898226584469298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156265167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192710857 + ... + 192710862.

It is an arithmetic number, because the mean of its divisors is an integer number (385421720).

Almost surely, 2^1156265157 is an apocalyptic number.

It is an amenable number.

1156265157 is a deficient number, since it is larger than the sum of its proper divisors (385421723).

1156265157 is an equidigital number, since it uses as much as digits as its factorization.

1156265157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385421722.

The product of its digits is 63000, while the sum is 39.

The square root of 1156265157 is about 34003.8991440688. The cubic root of 1156265157 is about 1049.5886996797.

The spelling of 1156265157 in words is "one billion, one hundred fifty-six million, two hundred sixty-five thousand, one hundred fifty-seven".