2139259 has 4 divisors (see below), whose sum is σ = 2144016. Its totient is φ = 2134504.

The previous prime is 2139233. The next prime is 2139283. The reversal of 2139259 is 9529312.

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 2139259 - 2⁵ = 2139227 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2139259.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139659) 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, 1624 + ... + 2629.

It is an arithmetic number, because the mean of its divisors is an integer number (536004).

2^2139259 is an apocalyptic number.

2139259 is a deficient number, since it is larger than the sum of its proper divisors (4757).

2139259 is an equidigital number, since it uses as much as digits as its factorization.

2139259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4756.

The product of its digits is 4860, while the sum is 31.

The square root of 2139259 is about 1462.6205933187. The cubic root of 2139259 is about 128.8509987657.

The spelling of 2139259 in words is "two million, one hundred thirty-nine thousand, two hundred fifty-nine".