1151292661 has 4 divisors (see below), whose sum is σ = 1151723500. Its totient is φ = 1150861824.

The previous prime is 1151292647. The next prime is 1151292677. The reversal of 1151292661 is 1662921511.

It is a happy number.

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 310640625 + 840652036 = 17625^2 + 28994^2 .

It is a cyclic number.

It is not a de Polignac number, because 1151292661 - 2⁷ = 1151292533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151292361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211386 + ... + 216763.

It is an arithmetic number, because the mean of its divisors is an integer number (287930875).

Almost surely, 2^1151292661 is an apocalyptic number.

It is an amenable number.

1151292661 is a deficient number, since it is larger than the sum of its proper divisors (430839).

1151292661 is an equidigital number, since it uses as much as digits as its factorization.

1151292661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430838.

The product of its digits is 6480, while the sum is 34.

The square root of 1151292661 is about 33930.7038093819. The cubic root of 1151292661 is about 1048.0819590570.

The spelling of 1151292661 in words is "one billion, one hundred fifty-one million, two hundred ninety-two thousand, six hundred sixty-one".