2171097 has 16 divisors (see below), whose sum is σ = 3240960. Its totient is φ = 1436400.

The previous prime is 2171089. The next prime is 2171101. The reversal of 2171097 is 7901712.

It is not a de Polignac number, because 2171097 - 2³ = 2171089 is a prime.

It is a super-4 number, since 4×2171097⁴ (a number of 26 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

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

2171097 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2171097.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171017) 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, 4947 + ... + 5367.

It is an arithmetic number, because the mean of its divisors is an integer number (202560).

2^2171097 is an apocalyptic number.

2171097 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2171097 is a deficient number, since it is larger than the sum of its proper divisors (1069863).

2171097 is a wasteful number, since it uses less digits than its factorization.

2171097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621 (or 615 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 27.

The square root of 2171097 is about 1473.4642852815. The cubic root of 2171097 is about 129.4870715516.

The spelling of 2171097 in words is "two million, one hundred seventy-one thousand, ninety-seven".