2521023 has 4 divisors (see below), whose sum is σ = 3361368. Its totient is φ = 1680680.

The previous prime is 2521021. The next prime is 2521031. The reversal of 2521023 is 3201252.

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

It is a cyclic number.

It is not a de Polignac number, because 2521023 - 2¹ = 2521021 is a prime.

It is a D-number.

2521023 is a lucky number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 2520993 and 2521011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521021) 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, 420168 + ... + 420173.

It is an arithmetic number, because the mean of its divisors is an integer number (840342).

2^2521023 is an apocalyptic number.

2521023 is a deficient number, since it is larger than the sum of its proper divisors (840345).

2521023 is an equidigital number, since it uses as much as digits as its factorization.

2521023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840344.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 2521023 is about 1587.7729686577. The cubic root of 2521023 is about 136.1002540772.

Adding to 2521023 its reverse (3201252), we get a palindrome (5722275).

It can be divided in two parts, 252 and 1023, that added together give a triangular number (1275 = T₅₀).

The spelling of 2521023 in words is "two million, five hundred twenty-one thousand, twenty-three".