13720502 has 4 divisors (see below), whose sum is σ = 20580756. Its totient is φ = 6860250.

The previous prime is 13720501. The next prime is 13720517. The reversal of 13720502 is 20502731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20502731 = 17 ⋅1206043.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13720501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3430124 + ... + 3430127.

It is an arithmetic number, because the mean of its divisors is an integer number (5145189).

Almost surely, 2^13720502 is an apocalyptic number.

13720502 is a deficient number, since it is larger than the sum of its proper divisors (6860254).

13720502 is an equidigital number, since it uses as much as digits as its factorization.

13720502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6860253.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 13720502 is about 3704.1195985011. The cubic root of 13720502 is about 239.3995522540.

The spelling of 13720502 in words is "thirteen million, seven hundred twenty thousand, five hundred two".