12291532 has 12 divisors (see below), whose sum is σ = 23465736. Its totient is φ = 5587040.

The previous prime is 12291497. The next prime is 12291533. The reversal of 12291532 is 23519221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12291497 and 12291506.

It is not an unprimeable number, because it can be changed into a prime (12291533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139633 + ... + 139720.

It is an arithmetic number, because the mean of its divisors is an integer number (1955478).

Almost surely, 2^12291532 is an apocalyptic number.

It is an amenable number.

12291532 is a deficient number, since it is larger than the sum of its proper divisors (11174204).

12291532 is a wasteful number, since it uses less digits than its factorization.

12291532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279368 (or 279366 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 12291532 is about 3505.9281224806. The cubic root of 12291532 is about 230.7820386168.

The spelling of 12291532 in words is "twelve million, two hundred ninety-one thousand, five hundred thirty-two".