2051239 has 4 divisors (see below), whose sum is σ = 2117440. Its totient is φ = 1985040.

The previous prime is 2051233. The next prime is 2051249. The reversal of 2051239 is 9321502.

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 2051239 - 2⁷ = 2051111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051233) 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, 33054 + ... + 33115.

It is an arithmetic number, because the mean of its divisors is an integer number (529360).

2^2051239 is an apocalyptic number.

2051239 is a deficient number, since it is larger than the sum of its proper divisors (66201).

2051239 is an equidigital number, since it uses as much as digits as its factorization.

2051239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66200.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 2051239 is about 1432.2147185391. The cubic root of 2051239 is about 127.0589967074.

It can be divided in two parts, 205 and 1239, that added together give a square (1444 = 38²).

The spelling of 2051239 in words is "two million, fifty-one thousand, two hundred thirty-nine".