2521501 has 2 divisors, whose sum is σ = 2521502. Its totient is φ = 2521500.

The previous prime is 2521499. The next prime is 2521507. The reversal of 2521501 is 1051252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2220100 + 301401 = 1490^2 + 549^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521501 - 2¹ = 2521499 is a prime.

Together with 2521499, it forms a pair of twin primes.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2521507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260750 + 1260751.

It is an arithmetic number, because the mean of its divisors is an integer number (1260751).

2^2521501 is an apocalyptic number.

It is an amenable number.

2521501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521501 is an equidigital number, since it uses as much as digits as its factorization.

2521501 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2521501 is about 1587.9234868217. The cubic root of 2521501 is about 136.1088553223.

Adding to 2521501 its reverse (1051252), we get a palindrome (3572753).

The spelling of 2521501 in words is "two million, five hundred twenty-one thousand, five hundred one".