12158501 has 2 divisors, whose sum is σ = 12158502. Its totient is φ = 12158500.

The previous prime is 12158449. The next prime is 12158507. The reversal of 12158501 is 10585121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8352100 + 3806401 = 2890^2 + 1951^2 .

It is an emirp because it is prime and its reverse (10585121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12158501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12158507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6079250 + 6079251.

It is an arithmetic number, because the mean of its divisors is an integer number (6079251).

Almost surely, 2^12158501 is an apocalyptic number.

It is an amenable number.

12158501 is a deficient number, since it is larger than the sum of its proper divisors (1).

12158501 is an equidigital number, since it uses as much as digits as its factorization.

12158501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 12158501 is about 3486.9042143426. The cubic root of 12158501 is about 229.9464336503.

The spelling of 12158501 in words is "twelve million, one hundred fifty-eight thousand, five hundred one".