2154520 has 32 divisors (see below), whose sum is σ = 4932720. Its totient is φ = 846720.

The previous prime is 2154499. The next prime is 2154533. The reversal of 2154520 is 254512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1999 + ... + 2881.

2^2154520 is an apocalyptic number.

2154520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2154520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2466360).

2154520 is an abundant number, since it is smaller than the sum of its proper divisors (2778200).

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

2154520 is a wasteful number, since it uses less digits than its factorization.

2154520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955 (or 951 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 2154520 is about 1467.8283278367. The cubic root of 2154520 is about 129.1566712117.

The spelling of 2154520 in words is "two million, one hundred fifty-four thousand, five hundred twenty".