3625021 has 4 divisors (see below), whose sum is σ = 3649500. Its totient is φ = 3600544.

The previous prime is 3625003. The next prime is 3625031. The reversal of 3625021 is 1205263.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1205263 = 67 ⋅17989.

It can be written as a sum of positive squares in 2 ways, for example, as 1625625 + 1999396 = 1275^2 + 1414^2 .

It is a cyclic number.

It is not a de Polignac number, because 3625021 - 2¹³ = 3616829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3625021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3625031) 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, 12016 + ... + 12313.

It is an arithmetic number, because the mean of its divisors is an integer number (912375).

Almost surely, 2^3625021 is an apocalyptic number.

It is an amenable number.

3625021 is a deficient number, since it is larger than the sum of its proper divisors (24479).

3625021 is a wasteful number, since it uses less digits than its factorization.

3625021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24478.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 3625021 is about 1903.9487913282. The cubic root of 3625021 is about 153.6161379212.

The spelling of 3625021 in words is "three million, six hundred twenty-five thousand, twenty-one".