13259978 has 8 divisors (see below), whose sum is σ = 19978272. Its totient is φ = 6600556.

The previous prime is 13259963. The next prime is 13259993. The reversal of 13259978 is 87995231.

It is an interprime number because it is at equal distance from previous prime (13259963) and next prime (13259993).

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

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 3 ways as a sum of consecutive naturals, for example, 14150 + ... + 15057.

It is an arithmetic number, because the mean of its divisors is an integer number (2497284).

Almost surely, 2^13259978 is an apocalyptic number.

13259978 is a deficient number, since it is larger than the sum of its proper divisors (6718294).

13259978 is a wasteful number, since it uses less digits than its factorization.

13259978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29436.

The product of its digits is 136080, while the sum is 44.

The square root of 13259978 is about 3641.4252704127. The cubic root of 13259978 is about 236.6905585437.

The spelling of 13259978 in words is "thirteen million, two hundred fifty-nine thousand, nine hundred seventy-eight".