13725999 has 24 divisors (see below), whose sum is σ = 23853440. Its totient is φ = 7429968.

The previous prime is 13725991. The next prime is 13726003. The reversal of 13725999 is 99952731.

It is a happy number.

It is not a de Polignac number, because 13725999 - 2³ = 13725991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13725991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4537 + ... + 6930.

Almost surely, 2^13725999 is an apocalyptic number.

13725999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13725999 is a deficient number, since it is larger than the sum of its proper divisors (10127441).

13725999 is a wasteful number, since it uses less digits than its factorization.

13725999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11499 (or 11496 counting only the distinct ones).

The product of its digits is 153090, while the sum is 45.

The square root of 13725999 is about 3704.8615358742. The cubic root of 13725999 is about 239.4315191026.

The spelling of 13725999 in words is "thirteen million, seven hundred twenty-five thousand, nine hundred ninety-nine".