2137591 has 4 divisors (see below), whose sum is σ = 2144272. Its totient is φ = 2130912.

The previous prime is 2137571. The next prime is 2137613. The reversal of 2137591 is 1957312.

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

It is a cyclic number.

It is not a de Polignac number, because 2137591 - 2¹³ = 2129399 is a prime.

It is an Ulam number.

It is a Duffinian number.

2137591 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2137571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2835 + ... + 3508.

It is an arithmetic number, because the mean of its divisors is an integer number (536068).

2^2137591 is an apocalyptic number.

2137591 is a deficient number, since it is larger than the sum of its proper divisors (6681).

2137591 is an equidigital number, since it uses as much as digits as its factorization.

2137591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6680.

The product of its digits is 1890, while the sum is 28.

The square root of 2137591 is about 1462.0502727335. The cubic root of 2137591 is about 128.8175012868.

The spelling of 2137591 in words is "two million, one hundred thirty-seven thousand, five hundred ninety-one".