2157084 has 24 divisors (see below), whose sum is σ = 5592720. Its totient is φ = 718992.

The previous prime is 2157041. The next prime is 2157091. The reversal of 2157084 is 4807512.

It is a super-2 number, since 2×2157084² = 9306022766112, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 9879 + ... + 10094.

It is an arithmetic number, because the mean of its divisors is an integer number (233030).

2^2157084 is an apocalyptic number.

It is an amenable number.

2157084 is an abundant number, since it is smaller than the sum of its proper divisors (3435636).

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

2157084 is a wasteful number, since it uses less digits than its factorization.

2157084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19986 (or 19978 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 2157084 is about 1468.7014672833. The cubic root of 2157084 is about 129.2078854693.

The spelling of 2157084 in words is "two million, one hundred fifty-seven thousand, eighty-four".