13215402 has 12 divisors (see below), whose sum is σ = 28633410. Its totient is φ = 4405128.

The previous prime is 13215383. The next prime is 13215421. The reversal of 13215402 is 20451231.

13215402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13215383) and next prime (13215421).

It can be written as a sum of positive squares in only one way, i.e., 8767521 + 4447881 = 2961^2 + 2109^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 734189 = 13215402 / (1 + 3 + 2 + 1 + 5 + 4 + 0 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 367077 + ... + 367112.

Almost surely, 2^13215402 is an apocalyptic number.

13215402 is an abundant number, since it is smaller than the sum of its proper divisors (15418008).

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

13215402 is a wasteful number, since it uses less digits than its factorization.

13215402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734197 (or 734194 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 13215402 is about 3635.2994374604. The cubic root of 13215402 is about 236.4250336378.

Adding to 13215402 its reverse (20451231), we get a palindrome (33666633).

The spelling of 13215402 in words is "thirteen million, two hundred fifteen thousand, four hundred two".