11875421 has 4 divisors (see below), whose sum is σ = 12038172. Its totient is φ = 11712672.

The previous prime is 11875417. The next prime is 11875427. The reversal of 11875421 is 12457811.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6446521 + 5428900 = 2539^2 + 2330^2 .

It is a cyclic number.

It is not a de Polignac number, because 11875421 - 2² = 11875417 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 (11875427) 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 in 3 ways as a sum of consecutive naturals, for example, 81266 + ... + 81411.

It is an arithmetic number, because the mean of its divisors is an integer number (3009543).

Almost surely, 2^11875421 is an apocalyptic number.

It is an amenable number.

11875421 is a deficient number, since it is larger than the sum of its proper divisors (162751).

11875421 is an equidigital number, since it uses as much as digits as its factorization.

11875421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162750.

The product of its digits is 2240, while the sum is 29.

The square root of 11875421 is about 3446.0732725814. The cubic root of 11875421 is about 228.1478278526.

The spelling of 11875421 in words is "eleven million, eight hundred seventy-five thousand, four hundred twenty-one".