2157474 has 32 divisors (see below), whose sum is σ = 4769856. Its totient is φ = 645120.

The previous prime is 2157457. The next prime is 2157481. The reversal of 2157474 is 4747512.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6234 + ... + 6570.

It is an arithmetic number, because the mean of its divisors is an integer number (149058).

2^2157474 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2157474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2384928).

2157474 is an abundant number, since it is smaller than the sum of its proper divisors (2612382).

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

2157474 is a wasteful number, since it uses less digits than its factorization.

2157474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450.

The product of its digits is 7840, while the sum is 30.

The square root of 2157474 is about 1468.8342316272. The cubic root of 2157474 is about 129.2156719129.

The spelling of 2157474 in words is "two million, one hundred fifty-seven thousand, four hundred seventy-four".