13540402 has 4 divisors (see below), whose sum is σ = 20310606. Its totient is φ = 6770200.

The previous prime is 13540393. The next prime is 13540411. The reversal of 13540402 is 20404531.

13540402 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.

It is an interprime number because it is at equal distance from previous prime (13540393) and next prime (13540411).

It can be written as a sum of positive squares in only one way, i.e., 7295401 + 6245001 = 2701^2 + 2499^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13540402.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3385099 + ... + 3385102.

Almost surely, 2^13540402 is an apocalyptic number.

13540402 is a deficient number, since it is larger than the sum of its proper divisors (6770204).

13540402 is an equidigital number, since it uses as much as digits as its factorization.

13540402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6770203.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 13540402 is about 3679.7285225951. The cubic root of 13540402 is about 238.3474552192.

Adding to 13540402 its reverse (20404531), we get a palindrome (33944933).

The spelling of 13540402 in words is "thirteen million, five hundred forty thousand, four hundred two".