13402237 has 2 divisors, whose sum is σ = 13402238. Its totient is φ = 13402236.

The previous prime is 13402229. The next prime is 13402247. The reversal of 13402237 is 73220431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8231161 + 5171076 = 2869^2 + 2274^2 .

It is a cyclic number.

It is not a de Polignac number, because 13402237 - 2³ = 13402229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13402247) 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, 6701118 + 6701119.

It is an arithmetic number, because the mean of its divisors is an integer number (6701119).

Almost surely, 2^13402237 is an apocalyptic number.

It is an amenable number.

13402237 is a deficient number, since it is larger than the sum of its proper divisors (1).

13402237 is an equidigital number, since it uses as much as digits as its factorization.

13402237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 13402237 is about 3660.9065817090. The cubic root of 13402237 is about 237.5339903337.

Adding to 13402237 its reverse (73220431), we get a palindrome (86622668).

The spelling of 13402237 in words is "thirteen million, four hundred two thousand, two hundred thirty-seven".