3625891 has 4 divisors (see below), whose sum is σ = 3644872. Its totient is φ = 3606912.

The previous prime is 3625883. The next prime is 3625939. The reversal of 3625891 is 1985263.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1985263 = 7 ⋅283609.

It is a cyclic number.

It is not a de Polignac number, because 3625891 - 2³ = 3625883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3625591) 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 3 ways as a sum of consecutive naturals, for example, 9201 + ... + 9586.

It is an arithmetic number, because the mean of its divisors is an integer number (911218).

Almost surely, 2^3625891 is an apocalyptic number.

3625891 is a deficient number, since it is larger than the sum of its proper divisors (18981).

3625891 is a wasteful number, since it uses less digits than its factorization.

3625891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18980.

The product of its digits is 12960, while the sum is 34.

The square root of 3625891 is about 1904.1772501529. The cubic root of 3625891 is about 153.6284261580.

The spelling of 3625891 in words is "three million, six hundred twenty-five thousand, eight hundred ninety-one".