13401855 has 20 divisors (see below), whose sum is σ = 24024792. Its totient is φ = 7147440.

The previous prime is 13401841. The next prime is 13401863. The reversal of 13401855 is 55810431.

It is not a de Polignac number, because 13401855 - 2⁹ = 13401343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16141 + ... + 16950.

Almost surely, 2^13401855 is an apocalyptic number.

13401855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13401855 is a deficient number, since it is larger than the sum of its proper divisors (10622937).

13401855 is an equidigital number, since it uses as much as digits as its factorization.

13401855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33108 (or 33099 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 13401855 is about 3660.8544084681. The cubic root of 13401855 is about 237.5317335252.

The spelling of 13401855 in words is "thirteen million, four hundred one thousand, eight hundred fifty-five".