2051901 has 6 divisors (see below), whose sum is σ = 2963870. Its totient is φ = 1367928.

The previous prime is 2051893. The next prime is 2051923. The reversal of 2051901 is 1091502.

It can be written as a sum of positive squares in only one way, i.e., 1887876 + 164025 = 1374^2 + 405^2 .

It is not a de Polignac number, because 2051901 - 2³ = 2051893 is a prime.

It is a Duffinian number.

2051901 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 113986 + ... + 114003.

2^2051901 is an apocalyptic number.

It is an amenable number.

2051901 is a deficient number, since it is larger than the sum of its proper divisors (911969).

2051901 is a wasteful number, since it uses less digits than its factorization.

2051901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227995 (or 227992 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 2051901 is about 1432.4458104934. The cubic root of 2051901 is about 127.0726638957.

The spelling of 2051901 in words is "two million, fifty-one thousand, nine hundred one".