2515021 has 4 divisors (see below), whose sum is σ = 2524192. Its totient is φ = 2505852.

The previous prime is 2515013. The next prime is 2515039. The reversal of 2515021 is 1205152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2515021 - 2³ = 2515013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2514986 and 2515004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2515081) 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, 4161 + ... + 4726.

It is an arithmetic number, because the mean of its divisors is an integer number (631048).

2^2515021 is an apocalyptic number.

It is an amenable number.

2515021 is a deficient number, since it is larger than the sum of its proper divisors (9171).

2515021 is an equidigital number, since it uses as much as digits as its factorization.

2515021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9170.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 2515021 is about 1585.8817736515. The cubic root of 2515021 is about 135.9921600152.

The spelling of 2515021 in words is "two million, five hundred fifteen thousand, twenty-one".