452521404102421 has 16 divisors (see below), whose sum is σ = 478951894280448. Its totient is φ = 426656557958400.

The previous prime is 452521404102413. The next prime is 452521404102473. The reversal of 452521404102421 is 124201404125254.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 452521404102421 - 2³ = 452521404102413 is a prime.

It is a super-2 number, since 2×452521404102421² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (452521404102401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22930146 + ... + 37826371.

It is an arithmetic number, because the mean of its divisors is an integer number (29934493392528).

Almost surely, 2^{452521404102421} is an apocalyptic number.

It is an amenable number.

452521404102421 is a deficient number, since it is larger than the sum of its proper divisors (26430490178027).

452521404102421 is a wasteful number, since it uses less digits than its factorization.

452521404102421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60761172.

The product of its (nonzero) digits is 102400, while the sum is 37.

Adding to 452521404102421 its reverse (124201404125254), we get a palindrome (576722808227675).

The spelling of 452521404102421 in words is "four hundred fifty-two trillion, five hundred twenty-one billion, four hundred four million, one hundred two thousand, four hundred twenty-one".