1151382961 has 4 divisors (see below), whose sum is σ = 1151917924. Its totient is φ = 1150848000.

The previous prime is 1151382929. The next prime is 1151382977. The reversal of 1151382961 is 1692831511.

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 524181025 + 627201936 = 22895^2 + 25044^2 .

It is a cyclic number.

It is not a de Polignac number, because 1151382961 - 2⁵ = 1151382929 is a prime.

It is a super-2 number, since 2×1151382961² = 2651365445762255042, 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 1151382961.

It is not an unprimeable number, because it can be changed into a prime (1151382161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264240 + ... + 268561.

It is an arithmetic number, because the mean of its divisors is an integer number (287979481).

Almost surely, 2^1151382961 is an apocalyptic number.

It is an amenable number.

1151382961 is a deficient number, since it is larger than the sum of its proper divisors (534963).

1151382961 is an equidigital number, since it uses as much as digits as its factorization.

1151382961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534962.

The product of its digits is 12960, while the sum is 37.

The square root of 1151382961 is about 33932.0344365026. The cubic root of 1151382961 is about 1048.1093599458.

The spelling of 1151382961 in words is "one billion, one hundred fifty-one million, three hundred eighty-two thousand, nine hundred sixty-one".