1156643225 has 6 divisors (see below), whose sum is σ = 1434237630. Its totient is φ = 925314560.

The previous prime is 1156643219. The next prime is 1156643231. The reversal of 1156643225 is 5223466511.

It is an interprime number because it is at equal distance from previous prime (1156643219) and next prime (1156643231).

It can be written as a sum of positive squares in 3 ways, for example, as 75811849 + 1080831376 = 8707^2 + 32876^2 .

It is not a de Polignac number, because 1156643225 - 2⁴ = 1156643209 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23132840 + ... + 23132889.

It is an arithmetic number, because the mean of its divisors is an integer number (239039605).

Almost surely, 2^1156643225 is an apocalyptic number.

It is an amenable number.

1156643225 is a deficient number, since it is larger than the sum of its proper divisors (277594405).

1156643225 is an equidigital number, since it uses as much as digits as its factorization.

1156643225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46265739 (or 46265734 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 1156643225 is about 34009.4578757145. The cubic root of 1156643225 is about 1049.7030830909.

The spelling of 1156643225 in words is "one billion, one hundred fifty-six million, six hundred forty-three thousand, two hundred twenty-five".