2174391 has 16 divisors (see below), whose sum is σ = 3333600. Its totient is φ = 1399104.

The previous prime is 2174387. The next prime is 2174399. The reversal of 2174391 is 1934712.

It is not a de Polignac number, because 2174391 - 2² = 2174387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2174399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 606 + ... + 2171.

It is an arithmetic number, because the mean of its divisors is an integer number (208350).

2^2174391 is an apocalyptic number.

2174391 is a deficient number, since it is larger than the sum of its proper divisors (1159209).

2174391 is a wasteful number, since it uses less digits than its factorization.

2174391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2815 (or 2809 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 2174391 is about 1474.5816355835. The cubic root of 2174391 is about 129.5525246204.

The spelling of 2174391 in words is "two million, one hundred seventy-four thousand, three hundred ninety-one".