11961157 has 8 divisors (see below), whose sum is σ = 13063680. Its totient is φ = 10884720.

The previous prime is 11961151. The next prime is 11961161. The reversal of 11961157 is 75116911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11961157 - 2⁷ = 11961029 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 (11961151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5557 + ... + 7402.

It is an arithmetic number, because the mean of its divisors is an integer number (1632960).

Almost surely, 2^11961157 is an apocalyptic number.

It is an amenable number.

11961157 is a deficient number, since it is larger than the sum of its proper divisors (1102523).

11961157 is a wasteful number, since it uses less digits than its factorization.

11961157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13043.

The product of its digits is 1890, while the sum is 31.

The square root of 11961157 is about 3458.4905667068. The cubic root of 11961157 is about 228.6955585254.

The spelling of 11961157 in words is "eleven million, nine hundred sixty-one thousand, one hundred fifty-seven".