11975445 has 20 divisors (see below), whose sum is σ = 21467820. Its totient is φ = 6386688.

The previous prime is 11975443. The next prime is 11975449. The reversal of 11975445 is 54457911.

It can be written as a sum of positive squares in 2 ways, for example, as 5349969 + 6625476 = 2313^2 + 2574^2 .

It is not a de Polignac number, because 11975445 - 2¹ = 11975443 is a prime.

It is a super-2 number, since 2×11975445² = 286822565896050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11975441) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14380 + ... + 15189.

It is an arithmetic number, because the mean of its divisors is an integer number (1073391).

Almost surely, 2^11975445 is an apocalyptic number.

11975445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11975445 is a deficient number, since it is larger than the sum of its proper divisors (9492375).

11975445 is an equidigital number, since it uses as much as digits as its factorization.

11975445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29586 (or 29577 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 11975445 is about 3460.5555912310. Note that the first 4 decimals coincide. The cubic root of 11975445 is about 228.7865837753.

The spelling of 11975445 in words is "eleven million, nine hundred seventy-five thousand, four hundred forty-five".