2506521 has 8 divisors (see below), whose sum is σ = 3356064. Its totient is φ = 1664000.

The previous prime is 2506501. The next prime is 2506523. The reversal of 2506521 is 1256052.

2506521 is nontrivially palindromic in base 2.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2506521 - 2⁵ = 2506489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2506523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 855 + ... + 2396.

It is an arithmetic number, because the mean of its divisors is an integer number (419508).

2^2506521 is an apocalyptic number.

It is an amenable number.

2506521 is a deficient number, since it is larger than the sum of its proper divisors (849543).

2506521 is a wasteful number, since it uses less digits than its factorization.

2506521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3511.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 2506521 is about 1583.1996083880. The cubic root of 2506521 is about 135.8387831588.

The spelling of 2506521 in words is "two million, five hundred six thousand, five hundred twenty-one".