2051905 has 8 divisors (see below), whose sum is σ = 2592000. Its totient is φ = 1555056.

The previous prime is 2051893. The next prime is 2051923. The reversal of 2051905 is 5091502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2051905 - 2¹⁵ = 2019137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10705 + ... + 10894.

It is an arithmetic number, because the mean of its divisors is an integer number (324000).

2^2051905 is an apocalyptic number.

It is an amenable number.

2051905 is a deficient number, since it is larger than the sum of its proper divisors (540095).

2051905 is a wasteful number, since it uses less digits than its factorization.

2051905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21623.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 2051905 is about 1432.4472067061. The cubic root of 2051905 is about 127.0727464679.

The spelling of 2051905 in words is "two million, fifty-one thousand, nine hundred five".