11995901 has 4 divisors (see below), whose sum is σ = 12006012. Its totient is φ = 11985792.

The previous prime is 11995891. The next prime is 11995909. The reversal of 11995901 is 10959911.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10959911 = 359 ⋅30529.

It can be written as a sum of positive squares in 2 ways, for example, as 9156676 + 2839225 = 3026^2 + 1685^2 .

It is a cyclic number.

It is not a de Polignac number, because 11995901 - 2²² = 7801597 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 (11995909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2996 + ... + 5741.

It is an arithmetic number, because the mean of its divisors is an integer number (3001503).

Almost surely, 2^11995901 is an apocalyptic number.

It is an amenable number.

11995901 is a deficient number, since it is larger than the sum of its proper divisors (10111).

11995901 is an equidigital number, since it uses as much as digits as its factorization.

11995901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10110.

The product of its (nonzero) digits is 3645, while the sum is 35.

The square root of 11995901 is about 3463.5099249172. The cubic root of 11995901 is about 228.9167778549.

The spelling of 11995901 in words is "eleven million, nine hundred ninety-five thousand, nine hundred one".