11955961 has 2 divisors, whose sum is σ = 11955962. Its totient is φ = 11955960.

The previous prime is 11955953. The next prime is 11955973. The reversal of 11955961 is 16955911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8555625 + 3400336 = 2925^2 + 1844^2 .

It is a cyclic number.

It is not a de Polignac number, because 11955961 - 2³ = 11955953 is a prime.

It is equal to p₇₈₅₃₇₇ and since 11955961 and 785377 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11955961.

It is not a weakly prime, because it can be changed into another prime (11955941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5977980 + 5977981.

It is an arithmetic number, because the mean of its divisors is an integer number (5977981).

Almost surely, 2^11955961 is an apocalyptic number.

It is an amenable number.

11955961 is a deficient number, since it is larger than the sum of its proper divisors (1).

11955961 is an equidigital number, since it uses as much as digits as its factorization.

11955961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12150, while the sum is 37.

The square root of 11955961 is about 3457.7392903456. The cubic root of 11955961 is about 228.6624381444.

The spelling of 11955961 in words is "eleven million, nine hundred fifty-five thousand, nine hundred sixty-one".