13145638 has 12 divisors (see below), whose sum is σ = 21538908. Its totient is φ = 5967560.

The previous prime is 13145617. The next prime is 13145651. The reversal of 13145638 is 83654131.

It is a congruent number.

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, 16620 + ... + 17392.

It is an arithmetic number, because the mean of its divisors is an integer number (1794909).

Almost surely, 2^13145638 is an apocalyptic number.

13145638 is a deficient number, since it is larger than the sum of its proper divisors (8393270).

13145638 is an frugal number, since it uses more digits than its factorization.

13145638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559 (or 786 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 13145638 is about 3625.6913823435. The cubic root of 13145638 is about 236.0082708008.

Adding to 13145638 its reverse (83654131), we get a palindrome (96799769).

The spelling of 13145638 in words is "thirteen million, one hundred forty-five thousand, six hundred thirty-eight".