254542521 has 4 divisors (see below), whose sum is σ = 339390032. Its totient is φ = 169695012.

The previous prime is 254542471. The next prime is 254542543. The reversal of 254542521 is 125245452.

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 not a de Polignac number, because 254542521 - 2⁹ = 254542009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (254546521) 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 in 3 ways as a sum of consecutive naturals, for example, 42423751 + ... + 42423756.

It is an arithmetic number, because the mean of its divisors is an integer number (84847508).

Almost surely, 2^254542521 is an apocalyptic number.

It is an amenable number.

254542521 is a deficient number, since it is larger than the sum of its proper divisors (84847511).

254542521 is an equidigital number, since it uses as much as digits as its factorization.

254542521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84847510.

The product of its digits is 16000, while the sum is 30.

The square root of 254542521 is about 15954.3887692384. The cubic root of 254542521 is about 633.7531247974.

Adding to 254542521 its reverse (125245452), we get a palindrome (379787973).

The spelling of 254542521 in words is "two hundred fifty-four million, five hundred forty-two thousand, five hundred twenty-one".