11900961 has 6 divisors (see below), whose sum is σ = 17190290. Its totient is φ = 7933968.

The previous prime is 11900951. The next prime is 11900963. The reversal of 11900961 is 16900911.

It can be written as a sum of positive squares in only one way, i.e., 8156736 + 3744225 = 2856^2 + 1935^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11900961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11900963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 661156 + ... + 661173.

Almost surely, 2^11900961 is an apocalyptic number.

It is an amenable number.

11900961 is a deficient number, since it is larger than the sum of its proper divisors (5289329).

11900961 is a wasteful number, since it uses less digits than its factorization.

11900961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322335 (or 1322332 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 11900961 is about 3449.7769493114. The cubic root of 11900961 is about 228.3112669223.

The spelling of 11900961 in words is "eleven million, nine hundred thousand, nine hundred sixty-one".