11953121 has 2 divisors, whose sum is σ = 11953122. Its totient is φ = 11953120.

The previous prime is 11953111. The next prime is 11953127. The reversal of 11953121 is 12135911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9891025 + 2062096 = 3145^2 + 1436^2 .

It is a cyclic number.

It is not a de Polignac number, because 11953121 - 2¹⁸ = 11690977 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11953127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5976560 + 5976561.

It is an arithmetic number, because the mean of its divisors is an integer number (5976561).

Almost surely, 2^11953121 is an apocalyptic number.

It is an amenable number.

11953121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11953121 is an equidigital number, since it uses as much as digits as its factorization.

11953121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270, while the sum is 23.

The square root of 11953121 is about 3457.3285930036. The cubic root of 11953121 is about 228.6443313397.

The spelling of 11953121 in words is "eleven million, nine hundred fifty-three thousand, one hundred twenty-one".