13970015 has 4 divisors (see below), whose sum is σ = 16764024. Its totient is φ = 11176008.

The previous prime is 13970009. The next prime is 13970023. The reversal of 13970015 is 51007931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51007931 = 13 ⋅3923687.

It is a cyclic number.

It is not a de Polignac number, because 13970015 - 2⁸ = 13969759 is a prime.

It is a super-2 number, since 2×13970015² = 390322638200450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1396997 + ... + 1397006.

It is an arithmetic number, because the mean of its divisors is an integer number (4191006).

Almost surely, 2^13970015 is an apocalyptic number.

13970015 is a deficient number, since it is larger than the sum of its proper divisors (2794009).

13970015 is an equidigital number, since it uses as much as digits as its factorization.

13970015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2794008.

The product of its (nonzero) digits is 945, while the sum is 26.

The square root of 13970015 is about 3737.6483248160. The cubic root of 13970015 is about 240.8420364853.

Adding to 13970015 its reverse (51007931), we get a palindrome (64977946).

The spelling of 13970015 in words is "thirteen million, nine hundred seventy thousand, fifteen".