454028521 has 4 divisors (see below), whose sum is σ = 454284100. Its totient is φ = 453772944.

The previous prime is 454028489. The next prime is 454028527. The reversal of 454028521 is 125820454.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125820454 = 2 ⋅62910227.

It can be written as a sum of positive squares in 2 ways, for example, as 399800025 + 54228496 = 19995^2 + 7364^2 .

It is a cyclic number.

It is not a de Polignac number, because 454028521 - 2⁵ = 454028489 is a prime.

It is a super-2 number, since 2×454028521² = 412283795762894882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (454028527) 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, 125106 + ... + 128683.

It is an arithmetic number, because the mean of its divisors is an integer number (113571025).

Almost surely, 2^454028521 is an apocalyptic number.

It is an amenable number.

454028521 is a deficient number, since it is larger than the sum of its proper divisors (255579).

454028521 is a wasteful number, since it uses less digits than its factorization.

454028521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255578.

The product of its (nonzero) digits is 12800, while the sum is 31.

The square root of 454028521 is about 21307.9450205786. The cubic root of 454028521 is about 768.5893783355.

Adding to 454028521 its reverse (125820454), we get a palindrome (579848975).

The spelling of 454028521 in words is "four hundred fifty-four million, twenty-eight thousand, five hundred twenty-one".