12661432 has 32 divisors (see below), whose sum is σ = 27256320. Its totient is φ = 5401440.

The previous prime is 12661399. The next prime is 12661433. The reversal of 12661432 is 23416621.

It is a super-3 number, since 3×12661432³ (a number of 22 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12661397 and 12661406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12661433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17053 + ... + 17779.

It is an arithmetic number, because the mean of its divisors is an integer number (851760).

Almost surely, 2^12661432 is an apocalyptic number.

It is an amenable number.

12661432 is an abundant number, since it is smaller than the sum of its proper divisors (14594888).

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

12661432 is a wasteful number, since it uses less digits than its factorization.

12661432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051 (or 1047 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 12661432 is about 3558.2906008363. The cubic root of 12661432 is about 233.0742393920.

The spelling of 12661432 in words is "twelve million, six hundred sixty-one thousand, four hundred thirty-two".