13240725 has 24 divisors (see below), whose sum is σ = 22311072. Its totient is φ = 6926400.

The previous prime is 13240697. The next prime is 13240729. The reversal of 13240725 is 52704231.

It is not a de Polignac number, because 13240725 - 2¹¹ = 13238677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13240695 and 13240704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13240729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2310 + ... + 5640.

It is an arithmetic number, because the mean of its divisors is an integer number (929628).

Almost surely, 2^13240725 is an apocalyptic number.

13240725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13240725 is a deficient number, since it is larger than the sum of its proper divisors (9070347).

13240725 is a wasteful number, since it uses less digits than its factorization.

13240725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3397 (or 3392 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 13240725 is about 3638.7807023782. The cubic root of 13240725 is about 236.5759477292.

Adding to 13240725 its reverse (52704231), we get a palindrome (65944956).

The spelling of 13240725 in words is "thirteen million, two hundred forty thousand, seven hundred twenty-five".