452015621 has 4 divisors (see below), whose sum is σ = 453143244. Its totient is φ = 450888000.

The previous prime is 452015617. The next prime is 452015623. The reversal of 452015621 is 126510254.

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

It can be written as a sum of positive squares in 2 ways, for example, as 293608225 + 158407396 = 17135^2 + 12586^2 .

It is a cyclic number.

It is not a de Polignac number, because 452015621 - 2² = 452015617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (452015623) 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, 563210 + ... + 564011.

It is an arithmetic number, because the mean of its divisors is an integer number (113285811).

Almost surely, 2^452015621 is an apocalyptic number.

It is an amenable number.

452015621 is a deficient number, since it is larger than the sum of its proper divisors (1127623).

452015621 is a wasteful number, since it uses less digits than its factorization.

452015621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127622.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 452015621 is about 21260.6589973124. The cubic root of 452015621 is about 767.4518686549.

Adding to 452015621 its reverse (126510254), we get a palindrome (578525875).

The spelling of 452015621 in words is "four hundred fifty-two million, fifteen thousand, six hundred twenty-one".