12009957 has 16 divisors (see below), whose sum is σ = 17218560. Its totient is φ = 7422192.

The previous prime is 12009953. The next prime is 12009961. The reversal of 12009957 is 75990021.

It is an interprime number because it is at equal distance from previous prime (12009953) and next prime (12009961).

It is not a de Polignac number, because 12009957 - 2² = 12009953 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12009953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 438 + ... + 4920.

It is an arithmetic number, because the mean of its divisors is an integer number (1076160).

Almost surely, 2^12009957 is an apocalyptic number.

It is an amenable number.

12009957 is a deficient number, since it is larger than the sum of its proper divisors (5208603).

12009957 is a wasteful number, since it uses less digits than its factorization.

12009957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4552.

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 12009957 is about 3465.5384862962. The cubic root of 12009957 is about 229.0061527812.

Adding to 12009957 its reverse (75990021), we get a palindrome (87999978).

The spelling of 12009957 in words is "twelve million, nine thousand, nine hundred fifty-seven".