13818725 has 6 divisors (see below), whose sum is σ = 17135250. Its totient is φ = 11054960.

The previous prime is 13818689. The next prime is 13818731. The reversal of 13818725 is 52781831.

It can be written as a sum of positive squares in 3 ways, for example, as 1442401 + 12376324 = 1201^2 + 3518^2 .

It is not a de Polignac number, because 13818725 - 2⁶ = 13818661 is a prime.

It is a Curzon number.

It is a congruent number.

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, 276350 + ... + 276399.

It is an arithmetic number, because the mean of its divisors is an integer number (2855875).

Almost surely, 2^13818725 is an apocalyptic number.

It is an amenable number.

13818725 is a deficient number, since it is larger than the sum of its proper divisors (3316525).

13818725 is an equidigital number, since it uses as much as digits as its factorization.

13818725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552759 (or 552754 counting only the distinct ones).

The product of its digits is 13440, while the sum is 35.

The square root of 13818725 is about 3717.3545701211. The cubic root of 13818725 is about 239.9694694960.

The spelling of 13818725 in words is "thirteen million, eight hundred eighteen thousand, seven hundred twenty-five".