12158497 has 8 divisors (see below), whose sum is σ = 13121640. Its totient is φ = 11199360.

The previous prime is 12158449. The next prime is 12158501. The reversal of 12158497 is 79485121.

It can be written as a sum of positive squares in 4 ways, for example, as 331776 + 11826721 = 576^2 + 3439^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12158497 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (12158407) 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, 9279 + ... + 10507.

It is an arithmetic number, because the mean of its divisors is an integer number (1640205).

Almost surely, 2^12158497 is an apocalyptic number.

It is an amenable number.

12158497 is a deficient number, since it is larger than the sum of its proper divisors (963143).

12158497 is a wasteful number, since it uses less digits than its factorization.

12158497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003.

The product of its digits is 20160, while the sum is 37.

The square root of 12158497 is about 3486.9036407678. The cubic root of 12158497 is about 229.9464084337.

The spelling of 12158497 in words is "twelve million, one hundred fifty-eight thousand, four hundred ninety-seven".