2154864 has 20 divisors (see below), whose sum is σ = 5566856. Its totient is φ = 718272.

The previous prime is 2154853. The next prime is 2154871. The reversal of 2154864 is 4684512.

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, 22399 + ... + 22494.

2^2154864 is an apocalyptic number.

2154864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2154864 is an abundant number, since it is smaller than the sum of its proper divisors (3411992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2154864 is a wasteful number, since it uses less digits than its factorization.

2154864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44904 (or 44898 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 2154864 is about 1467.9455030756. The cubic root of 2154864 is about 129.1635447505.

It can be divided in two parts, 21548 and 64, that added together give a palindrome (21612).

The spelling of 2154864 in words is "two million, one hundred fifty-four thousand, eight hundred sixty-four".