2455891 has 4 divisors (see below), whose sum is σ = 2508192. Its totient is φ = 2403592.

The previous prime is 2455889. The next prime is 2455897. The reversal of 2455891 is 1985542.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2455891 - 2¹ = 2455889 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2455897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26080 + ... + 26173.

It is an arithmetic number, because the mean of its divisors is an integer number (627048).

2^2455891 is an apocalyptic number.

2455891 is a deficient number, since it is larger than the sum of its proper divisors (52301).

2455891 is an equidigital number, since it uses as much as digits as its factorization.

2455891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52300.

The product of its digits is 14400, while the sum is 34.

The square root of 2455891 is about 1567.1282653312. The cubic root of 2455891 is about 134.9179382392.

It can be divided in two parts, 24558 and 91, that added together give a square (24649 = 157²).

The spelling of 2455891 in words is "two million, four hundred fifty-five thousand, eight hundred ninety-one".