12201439 has 12 divisors (see below), whose sum is σ = 13082016. Its totient is φ = 11376288.

The previous prime is 12201419. The next prime is 12201457. The reversal of 12201439 is 93410221.

It is not a de Polignac number, because 12201439 - 2⁵ = 12201407 is a prime.

It is a super-2 number, since 2×12201439² = 297750227341442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201419) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26122 + ... + 26584.

It is an arithmetic number, because the mean of its divisors is an integer number (1090168).

Almost surely, 2^12201439 is an apocalyptic number.

12201439 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12201439 is a deficient number, since it is larger than the sum of its proper divisors (880577).

12201439 is an equidigital number, since it uses as much as digits as its factorization.

12201439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574 (or 555 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 12201439 is about 3493.0558254915. The cubic root of 12201439 is about 230.2168025048.

The spelling of 12201439 in words is "twelve million, two hundred one thousand, four hundred thirty-nine".