13120424 has 8 divisors (see below), whose sum is σ = 24600810. Its totient is φ = 6560208.

The previous prime is 13120423. The next prime is 13120427. The reversal of 13120424 is 42402131.

It can be written as a sum of positive squares in only one way, i.e., 12888100 + 232324 = 3590^2 + 482^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (13120423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820019 + ... + 820034.

Almost surely, 2^13120424 is an apocalyptic number.

It is an amenable number.

13120424 is a deficient number, since it is larger than the sum of its proper divisors (11480386).

13120424 is a wasteful number, since it uses less digits than its factorization.

13120424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640059 (or 1640055 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 13120424 is about 3622.2125834909. The cubic root of 13120424 is about 235.8572822831.

Adding to 13120424 its reverse (42402131), we get a palindrome (55522555).

The spelling of 13120424 in words is "thirteen million, one hundred twenty thousand, four hundred twenty-four".