13123140 has 24 divisors (see below), whose sum is σ = 36744960. Its totient is φ = 3499488.

The previous prime is 13123111. The next prime is 13123147. The reversal of 13123140 is 4132131.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (13123147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109300 + ... + 109419.

It is an arithmetic number, because the mean of its divisors is an integer number (1531040).

Almost surely, 2^13123140 is an apocalyptic number.

13123140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13123140 is an abundant number, since it is smaller than the sum of its proper divisors (23621820).

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

13123140 is a wasteful number, since it uses less digits than its factorization.

13123140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218731 (or 218729 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 13123140 is about 3622.5874730640. The cubic root of 13123140 is about 235.8735557455.

Adding to 13123140 its reverse (4132131), we get a palindrome (17255271).

The spelling of 13123140 in words is "thirteen million, one hundred twenty-three thousand, one hundred forty".