2525021 has 4 divisors (see below), whose sum is σ = 2536092. Its totient is φ = 2513952.

The previous prime is 2525011. The next prime is 2525041. The reversal of 2525021 is 1205252.

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

It can be written as a sum of positive squares in 2 ways, for example, as 525625 + 1999396 = 725^2 + 1414^2 .

It is a cyclic number.

It is not a de Polignac number, because 2525021 - 2¹⁸ = 2262877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2525011) 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, 5186 + ... + 5651.

It is an arithmetic number, because the mean of its divisors is an integer number (634023).

2^2525021 is an apocalyptic number.

It is an amenable number.

2525021 is a deficient number, since it is larger than the sum of its proper divisors (11071).

2525021 is a wasteful number, since it uses less digits than its factorization.

2525021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11070.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 2525021 is about 1589.0314660195. The cubic root of 2525021 is about 136.1721615833.

The spelling of 2525021 in words is "two million, five hundred twenty-five thousand, twenty-one".