13156394 has 4 divisors (see below), whose sum is σ = 19734594. Its totient is φ = 6578196.

The previous prime is 13156357. The next prime is 13156397. The reversal of 13156394 is 49365131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49365131 = 67 ⋅736793.

It can be written as a sum of positive squares in only one way, i.e., 12780625 + 375769 = 3575^2 + 613^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13156394.

It is not an unprimeable number, because it can be changed into a prime (13156397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3289097 + ... + 3289100.

Almost surely, 2^13156394 is an apocalyptic number.

13156394 is a deficient number, since it is larger than the sum of its proper divisors (6578200).

13156394 is an equidigital number, since it uses as much as digits as its factorization.

13156394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6578199.

The product of its digits is 9720, while the sum is 32.

The square root of 13156394 is about 3627.1743823533. The cubic root of 13156394 is about 236.0726220055.

The spelling of 13156394 in words is "thirteen million, one hundred fifty-six thousand, three hundred ninety-four".