451542521 has 2 divisors, whose sum is σ = 451542522. Its totient is φ = 451542520.

The previous prime is 451542439. The next prime is 451542523. The reversal of 451542521 is 125245154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 432182521 + 19360000 = 20789^2 + 4400^2 .

It is a cyclic number.

It is not a de Polignac number, because 451542521 - 2¹⁸ = 451280377 is a prime.

Together with 451542523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (451542523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225771260 + 225771261.

It is an arithmetic number, because the mean of its divisors is an integer number (225771261).

Almost surely, 2^451542521 is an apocalyptic number.

It is an amenable number.

451542521 is a deficient number, since it is larger than the sum of its proper divisors (1).

451542521 is an equidigital number, since it uses as much as digits as its factorization.

451542521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8000, while the sum is 29.

The square root of 451542521 is about 21249.5299006825. The cubic root of 451542521 is about 767.1840252380.

Adding to 451542521 its reverse (125245154), we get a palindrome (576787675).

The spelling of 451542521 in words is "four hundred fifty-one million, five hundred forty-two thousand, five hundred twenty-one".