2054139 has 4 divisors (see below), whose sum is σ = 2738856. Its totient is φ = 1369424.

The previous prime is 2054131. The next prime is 2054149. The reversal of 2054139 is 9314502.

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 2054139 - 2³ = 2054131 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2054131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342354 + ... + 342359.

It is an arithmetic number, because the mean of its divisors is an integer number (684714).

2^2054139 is an apocalyptic number.

2054139 is a deficient number, since it is larger than the sum of its proper divisors (684717).

2054139 is an equidigital number, since it uses as much as digits as its factorization.

2054139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684716.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 2054139 is about 1433.2267789851. The cubic root of 2054139 is about 127.1188463204.

The spelling of 2054139 in words is "two million, fifty-four thousand, one hundred thirty-nine".