1165012631 has 4 divisors (see below), whose sum is σ = 1192105992. Its totient is φ = 1137919272.

The previous prime is 1165012619. The next prime is 1165012633. The reversal of 1165012631 is 1362105611.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1165012631 is a prime.

It is a super-2 number, since 2×1165012631² = 2714508860779084322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1165012631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165012633) 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, 13546616 + ... + 13546701.

It is an arithmetic number, because the mean of its divisors is an integer number (298026498).

Almost surely, 2^1165012631 is an apocalyptic number.

1165012631 is a deficient number, since it is larger than the sum of its proper divisors (27093361).

1165012631 is an equidigital number, since it uses as much as digits as its factorization.

1165012631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27093360.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1165012631 is about 34132.2813623701. The cubic root of 1165012631 is about 1052.2288650742.

The spelling of 1165012631 in words is "one billion, one hundred sixty-five million, twelve thousand, six hundred thirty-one".