13690025 has 6 divisors (see below), whose sum is σ = 16975662. Its totient is φ = 10952000.

The previous prime is 13689997. The next prime is 13690031. The reversal of 13690025 is 52009631.

It can be written as a sum of positive squares in 3 ways, for example, as 4910656 + 8779369 = 2216^2 + 2963^2 .

It is not a de Polignac number, because 13690025 - 2¹² = 13685929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13689976 and 13690003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 273776 + ... + 273825.

It is an arithmetic number, because the mean of its divisors is an integer number (2829277).

Almost surely, 2^13690025 is an apocalyptic number.

It is an amenable number.

13690025 is a deficient number, since it is larger than the sum of its proper divisors (3285637).

13690025 is an equidigital number, since it uses as much as digits as its factorization.

13690025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547611 (or 547606 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 13690025 is about 3700.0033783768. The cubic root of 13690025 is about 239.2221634795. Note that the first 3 decimals are identical.

Adding to 13690025 its reverse (52009631), we get a palindrome (65699656).

It can be divided in two parts, 136900 and 25, that multiplied together give a square (3422500 = 1850²).

The spelling of 13690025 in words is "thirteen million, six hundred ninety thousand, twenty-five".