2025891 has 28 divisors (see below), whose sum is σ = 3480112. Its totient is φ = 1154736.

The previous prime is 2025887. The next prime is 2025899. The reversal of 2025891 is 1985202.

It is not a de Polignac number, because 2025891 - 2² = 2025887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2025899) 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 27 ways as a sum of consecutive naturals, for example, 4905 + ... + 5301.

2^2025891 is an apocalyptic number.

2025891 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2025891 is a deficient number, since it is larger than the sum of its proper divisors (1454221).

2025891 is an frugal number, since it uses more digits than its factorization.

2025891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 2025891 is about 1423.3379781345. The cubic root of 2025891 is about 126.5334525931.

It can be divided in two parts, 2025 and 891, that added together give a square (2916 = 54²).

The spelling of 2025891 in words is "two million, twenty-five thousand, eight hundred ninety-one".