11921142 has 16 divisors (see below), whose sum is σ = 23914800. Its totient is φ = 3961632.

The previous prime is 11921137. The next prime is 11921177. The reversal of 11921142 is 24112911.

It is a happy number.

It is a super-2 number, since 2×11921142² = 284227253168328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 753 + ... + 4940.

It is an arithmetic number, because the mean of its divisors is an integer number (1494675).

Almost surely, 2^11921142 is an apocalyptic number.

11921142 is an abundant number, since it is smaller than the sum of its proper divisors (11993658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11921142 is a wasteful number, since it uses less digits than its factorization.

11921142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6047.

The product of its digits is 144, while the sum is 21.

The square root of 11921142 is about 3452.7006820748. The cubic root of 11921142 is about 228.4402466385.

The spelling of 11921142 in words is "eleven million, nine hundred twenty-one thousand, one hundred forty-two".