13078402 has 4 divisors (see below), whose sum is σ = 19617606. Its totient is φ = 6539200.

The previous prime is 13078397. The next prime is 13078411. The reversal of 13078402 is 20487031.

13078402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20487031 = 307 ⋅66733.

It can be written as a sum of positive squares in only one way, i.e., 10764961 + 2313441 = 3281^2 + 1521^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3269599 + ... + 3269602.

Almost surely, 2^13078402 is an apocalyptic number.

13078402 is a deficient number, since it is larger than the sum of its proper divisors (6539204).

13078402 is an equidigital number, since it uses as much as digits as its factorization.

13078402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6539203.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 13078402 is about 3616.4073332522. The cubic root of 13078402 is about 235.6052123106.

The spelling of 13078402 in words is "thirteen million, seventy-eight thousand, four hundred two".