12291423 has 16 divisors (see below), whose sum is σ = 17356800. Its totient is φ = 7715520.

The previous prime is 12291413. The next prime is 12291427. The reversal of 12291423 is 32419221.

It is not a de Polignac number, because 12291423 - 2¹⁶ = 12225887 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12291393 and 12291402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12291427) 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, 10323 + ... + 11451.

It is an arithmetic number, because the mean of its divisors is an integer number (1084800).

Almost surely, 2^12291423 is an apocalyptic number.

12291423 is a deficient number, since it is larger than the sum of its proper divisors (5065377).

12291423 is a wasteful number, since it uses less digits than its factorization.

12291423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342.

The product of its digits is 864, while the sum is 24.

The square root of 12291423 is about 3505.9125773470. The cubic root of 12291423 is about 230.7813564312.

The spelling of 12291423 in words is "twelve million, two hundred ninety-one thousand, four hundred twenty-three".