2137145 has 4 divisors (see below), whose sum is σ = 2564580. Its totient is φ = 1709712.

The previous prime is 2137141. The next prime is 2137151. The reversal of 2137145 is 5417312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 900601 + 1236544 = 949^2 + 1112^2 .

It is a cyclic number.

It is not a de Polignac number, because 2137145 - 2² = 2137141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2137145.

It is not an unprimeable number, because it can be changed into a prime (2137141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213710 + ... + 213719.

It is an arithmetic number, because the mean of its divisors is an integer number (641145).

2^2137145 is an apocalyptic number.

It is an amenable number.

2137145 is a deficient number, since it is larger than the sum of its proper divisors (427435).

2137145 is an equidigital number, since it uses as much as digits as its factorization.

2137145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427434.

The product of its digits is 840, while the sum is 23.

The square root of 2137145 is about 1461.8977392417. The cubic root of 2137145 is about 128.8085415744.

The spelling of 2137145 in words is "two million, one hundred thirty-seven thousand, one hundred forty-five".