2154280 has 16 divisors (see below), whose sum is σ = 4847220. Its totient is φ = 861696.

The previous prime is 2154259. The next prime is 2154281. The reversal of 2154280 is 824512.

It can be written as a sum of positive squares in 2 ways, for example, as 2067844 + 86436 = 1438^2 + 294^2 .

It is not an unprimeable number, because it can be changed into a prime (2154281) 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, 26889 + ... + 26968.

2^2154280 is an apocalyptic number.

2154280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2154280 is an abundant number, since it is smaller than the sum of its proper divisors (2692940).

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

2154280 is a wasteful number, since it uses less digits than its factorization.

2154280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53868 (or 53864 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 2154280 is about 1467.7465721302. The cubic root of 2154280 is about 129.1518752862.

Adding to 2154280 its reverse (824512), we get a palindrome (2978792).

The spelling of 2154280 in words is "two million, one hundred fifty-four thousand, two hundred eighty".