13421878 has 8 divisors (see below), whose sum is σ = 20148768. Its totient is φ = 6705624.

The previous prime is 13421873. The next prime is 13421887. The reversal of 13421878 is 87812431.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13421873) 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 3 ways as a sum of consecutive naturals, for example, 2500 + ... + 5752.

It is an arithmetic number, because the mean of its divisors is an integer number (2518596).

Almost surely, 2^13421878 is an apocalyptic number.

13421878 is a deficient number, since it is larger than the sum of its proper divisors (6726890).

13421878 is a wasteful number, since it uses less digits than its factorization.

13421878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5318.

The product of its digits is 10752, while the sum is 34.

The square root of 13421878 is about 3663.5881318729. The cubic root of 13421878 is about 237.6499691787.

The spelling of 13421878 in words is "thirteen million, four hundred twenty-one thousand, eight hundred seventy-eight".