11921506 has 4 divisors (see below), whose sum is σ = 17882262. Its totient is φ = 5960752.

The previous prime is 11921501. The next prime is 11921519. The reversal of 11921506 is 60512911.

11921506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 10208025 + 1713481 = 3195^2 + 1309^2 .

It is not an unprimeable number, because it can be changed into a prime (11921501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2980375 + ... + 2980378.

Almost surely, 2^11921506 is an apocalyptic number.

11921506 is a deficient number, since it is larger than the sum of its proper divisors (5960756).

11921506 is an equidigital number, since it uses as much as digits as its factorization.

11921506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5960755.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 11921506 is about 3452.7533940321. The cubic root of 11921506 is about 228.4425716788.

The spelling of 11921506 in words is "eleven million, nine hundred twenty-one thousand, five hundred six".