454020421 has 4 divisors (see below), whose sum is σ = 454095244. Its totient is φ = 453945600.

The previous prime is 454020407. The next prime is 454020461. The reversal of 454020421 is 124020454.

It is a happy number.

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 403809025 + 50211396 = 20095^2 + 7086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-454020421 is a prime.

It is a super-2 number, since 2×454020421² = 412269085370034482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 454020392 and 454020401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (454020401) 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, 27420 + ... + 40741.

It is an arithmetic number, because the mean of its divisors is an integer number (113523811).

Almost surely, 2^454020421 is an apocalyptic number.

It is an amenable number.

454020421 is a deficient number, since it is larger than the sum of its proper divisors (74823).

454020421 is an equidigital number, since it uses as much as digits as its factorization.

454020421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74822.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 454020421 is about 21307.7549497830. The cubic root of 454020421 is about 768.5848076895.

Adding to 454020421 its reverse (124020454), we get a palindrome (578040875).

The spelling of 454020421 in words is "four hundred fifty-four million, twenty thousand, four hundred twenty-one".