13144642 has 12 divisors (see below), whose sum is σ = 22936230. Its totient is φ = 5633376.

The previous prime is 13144639. The next prime is 13144673. The reversal of 13144642 is 24644131.

It can be written as a sum of positive squares in only one way, i.e., 11431161 + 1713481 = 3381^2 + 1309^2 .

It is a super-2 number, since 2×13144642² = 345563226616328, which contains 22 as substring.

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, 66967 + ... + 67162.

Almost surely, 2^13144642 is an apocalyptic number.

13144642 is a deficient number, since it is larger than the sum of its proper divisors (9791588).

13144642 is a wasteful number, since it uses less digits than its factorization.

13144642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134145 (or 134138 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 13144642 is about 3625.5540266282. The cubic root of 13144642 is about 236.0023101373.

Adding to 13144642 its reverse (24644131), we get a palindrome (37788773).

The spelling of 13144642 in words is "thirteen million, one hundred forty-four thousand, six hundred forty-two".