13971402 has 24 divisors (see below), whose sum is σ = 30553380. Its totient is φ = 4613760.

The previous prime is 13971389. The next prime is 13971407. The reversal of 13971402 is 20417931.

It can be written as a sum of positive squares in 2 ways, for example, as 13329801 + 641601 = 3651^2 + 801^2 .

It is not an unprimeable number, because it can be changed into a prime (13971407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1599 + ... + 5522.

Almost surely, 2^13971402 is an apocalyptic number.

13971402 is an abundant number, since it is smaller than the sum of its proper divisors (16581978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13971402 is a wasteful number, since it uses less digits than its factorization.

13971402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7238 (or 7235 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 13971402 is about 3737.8338646869. The cubic root of 13971402 is about 240.8500068143.

The spelling of 13971402 in words is "thirteen million, nine hundred seventy-one thousand, four hundred two".