11157961 has 2 divisors, whose sum is σ = 11157962. Its totient is φ = 11157960.

The previous prime is 11157943. The next prime is 11157983. The reversal of 11157961 is 16975111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9000000 + 2157961 = 3000^2 + 1469^2 .

It is a cyclic number.

It is not a de Polignac number, because 11157961 - 2¹⁵ = 11125193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11157061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5578980 + 5578981.

It is an arithmetic number, because the mean of its divisors is an integer number (5578981).

Almost surely, 2^11157961 is an apocalyptic number.

It is an amenable number.

11157961 is a deficient number, since it is larger than the sum of its proper divisors (1).

11157961 is an equidigital number, since it uses as much as digits as its factorization.

11157961 is an evil number, because the sum of its binary digits is even.

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

The square root of 11157961 is about 3340.3534244148. The cubic root of 11157961 is about 223.4575055131.

The spelling of 11157961 in words is "eleven million, one hundred fifty-seven thousand, nine hundred sixty-one".