2045251 has 4 divisors (see below), whose sum is σ = 2202592. Its totient is φ = 1887912.

The previous prime is 2045213. The next prime is 2045311. The reversal of 2045251 is 1525402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2045251 - 2⁹ = 2044739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2045651) 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, 78651 + ... + 78676.

It is an arithmetic number, because the mean of its divisors is an integer number (550648).

2^2045251 is an apocalyptic number.

2045251 is a deficient number, since it is larger than the sum of its proper divisors (157341).

2045251 is a wasteful number, since it uses less digits than its factorization.

2045251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157340.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 2045251 is about 1430.1227220068. The cubic root of 2045251 is about 126.9352388525.

It can be divided in two parts, 20452 and 51, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 2045251 in words is "two million, forty-five thousand, two hundred fifty-one".