12402157 has 2 divisors, whose sum is σ = 12402158. Its totient is φ = 12402156.

The previous prime is 12402151. The next prime is 12402167. The reversal of 12402157 is 75120421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7107556 + 5294601 = 2666^2 + 2301^2 .

It is a cyclic number.

It is not a de Polignac number, because 12402157 - 2³ = 12402149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12402151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6201078 + 6201079.

It is an arithmetic number, because the mean of its divisors is an integer number (6201079).

Almost surely, 2^12402157 is an apocalyptic number.

It is an amenable number.

12402157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12402157 is an equidigital number, since it uses as much as digits as its factorization.

12402157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 12402157 is about 3521.6696324329. The cubic root of 12402157 is about 231.4723255578.

Adding to 12402157 its reverse (75120421), we get a palindrome (87522578).

The spelling of 12402157 in words is "twelve million, four hundred two thousand, one hundred fifty-seven".