2521003 has 2 divisors, whose sum is σ = 2521004. Its totient is φ = 2521002.

The previous prime is 2520983. The next prime is 2521019. The reversal of 2521003 is 3001252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2521003 - 2⁵ = 2520971 is a prime.

It is a super-2 number, since 2×2521003² = 12710912252018, which contains 22 as substring.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (2521063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260501 + 1260502.

It is an arithmetic number, because the mean of its divisors is an integer number (1260502).

2^2521003 is an apocalyptic number.

2521003 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521003 is an equidigital number, since it uses as much as digits as its factorization.

2521003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 2521003 is about 1587.7666705155. The cubic root of 2521003 is about 136.0998941687.

Adding to 2521003 its reverse (3001252), we get a palindrome (5522255).

Subtracting 2521003 from its reverse (3001252), we obtain a square (480249 = 693²).

The spelling of 2521003 in words is "two million, five hundred twenty-one thousand, three".