12291442 has 32 divisors (see below), whose sum is σ = 20995200. Its totient is φ = 5361408.

The previous prime is 12291427. The next prime is 12291443. The reversal of 12291442 is 24419221.

It is not an unprimeable number, because it can be changed into a prime (12291443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34059 + ... + 34417.

It is an arithmetic number, because the mean of its divisors is an integer number (656100).

Almost surely, 2^12291442 is an apocalyptic number.

12291442 is a deficient number, since it is larger than the sum of its proper divisors (8703758).

12291442 is a wasteful number, since it uses less digits than its factorization.

12291442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450.

The product of its digits is 1152, while the sum is 25.

The square root of 12291442 is about 3505.9152870542. The cubic root of 12291442 is about 230.7814753446.

The spelling of 12291442 in words is "twelve million, two hundred ninety-one thousand, four hundred forty-two".