13120740 has 36 divisors (see below), whose sum is σ = 39800124. Its totient is φ = 3498816.

The previous prime is 13120739. The next prime is 13120759. The reversal of 13120740 is 4702131.

It can be written as a sum of positive squares in 2 ways, for example, as 1871424 + 11249316 = 1368^2 + 3354^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36267 + ... + 36626.

It is an arithmetic number, because the mean of its divisors is an integer number (1105559).

Almost surely, 2^13120740 is an apocalyptic number.

13120740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13120740 is an abundant number, since it is smaller than the sum of its proper divisors (26679384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13120740 is a wasteful number, since it uses less digits than its factorization.

13120740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72908 (or 72903 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 13120740 is about 3622.2562029763. The cubic root of 13120740 is about 235.8591757763.

Adding to 13120740 its reverse (4702131), we get a palindrome (17822871).

The spelling of 13120740 in words is "thirteen million, one hundred twenty thousand, seven hundred forty".