11975409 has 6 divisors (see below), whose sum is σ = 17297826. Its totient is φ = 7983600.

The previous prime is 11975399. The next prime is 11975413. The reversal of 11975409 is 90457911.

It can be written as a sum of positive squares in only one way, i.e., 9734400 + 2241009 = 3120^2 + 1497^2 .

It is not a de Polignac number, because 11975409 - 2⁸ = 11975153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11975419) 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, 665292 + ... + 665309.

It is an arithmetic number, because the mean of its divisors is an integer number (2882971).

Almost surely, 2^11975409 is an apocalyptic number.

It is an amenable number.

11975409 is a deficient number, since it is larger than the sum of its proper divisors (5322417).

11975409 is a wasteful number, since it uses less digits than its factorization.

11975409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330607 (or 1330604 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 11975409 is about 3460.5503897502. The cubic root of 11975409 is about 228.7863545194.

The spelling of 11975409 in words is "eleven million, nine hundred seventy-five thousand, four hundred nine".