2025639 has 48 divisors (see below), whose sum is σ = 3793920. Its totient is φ = 1010880.

The previous prime is 2025637. The next prime is 2025641. The reversal of 2025639 is 9365202.

2025639 is a `hidden beast` number, since 2 + 0 + 25 + 639 = 666.

It is an interprime number because it is at equal distance from previous prime (2025637) and next prime (2025641).

It is not a de Polignac number, because 2025639 - 2¹ = 2025637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2025631) 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 47 ways as a sum of consecutive naturals, for example, 25602 + ... + 25680.

It is an arithmetic number, because the mean of its divisors is an integer number (79040).

2^2025639 is an apocalyptic number.

2025639 is a deficient number, since it is larger than the sum of its proper divisors (1768281).

2025639 is a wasteful number, since it uses less digits than its factorization.

2025639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 2025639 is about 1423.2494510802. The cubic root of 2025639 is about 126.5282058889.

The spelling of 2025639 in words is "two million, twenty-five thousand, six hundred thirty-nine".