2177145 has 16 divisors (see below), whose sum is σ = 3870720. Its totient is φ = 1161072.

The previous prime is 2177143. The next prime is 2177167. The reversal of 2177145 is 5417712.

It is not a de Polignac number, because 2177145 - 2¹ = 2177143 is a prime.

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

2177145 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2177143) 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, 7929 + ... + 8198.

It is an arithmetic number, because the mean of its divisors is an integer number (241920).

2^2177145 is an apocalyptic number.

It is an amenable number.

2177145 is a deficient number, since it is larger than the sum of its proper divisors (1693575).

2177145 is a wasteful number, since it uses less digits than its factorization.

2177145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16141 (or 16135 counting only the distinct ones).

The product of its digits is 1960, while the sum is 27.

The square root of 2177145 is about 1475.5151642731. The cubic root of 2177145 is about 129.6071969597.

It can be divided in two parts, 2 and 177145, that added together give a 11-th power (177147 = 3¹¹).

The spelling of 2177145 in words is "two million, one hundred seventy-seven thousand, one hundred forty-five".