13920015 has 8 divisors (see below), whose sum is σ = 22272048. Its totient is φ = 7424000.

The previous prime is 13919993. The next prime is 13920019. The reversal of 13920015 is 51002931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13920015 - 2⁷ = 13919887 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13919973 and 13920000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13920019) 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 7 ways as a sum of consecutive naturals, for example, 463986 + ... + 464015.

It is an arithmetic number, because the mean of its divisors is an integer number (2784006).

Almost surely, 2^13920015 is an apocalyptic number.

13920015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13920015 is a deficient number, since it is larger than the sum of its proper divisors (8352033).

13920015 is an equidigital number, since it uses as much as digits as its factorization.

13920015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928009.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 13920015 is about 3730.9536314460. The cubic root of 13920015 is about 240.5543608919.

Adding to 13920015 its reverse (51002931), we get a palindrome (64922946).

The spelling of 13920015 in words is "thirteen million, nine hundred twenty thousand, fifteen".