421435457 has 4 divisors (see below), whose sum is σ = 446225796. Its totient is φ = 396645120.

The previous prime is 421435451. The next prime is 421435471. The reversal of 421435457 is 754534124.

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 354342976 + 67092481 = 18824^2 + 8191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421435457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421435451) 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, 12395144 + ... + 12395177.

It is an arithmetic number, because the mean of its divisors is an integer number (111556449).

Almost surely, 2^421435457 is an apocalyptic number.

It is an amenable number.

421435457 is a deficient number, since it is larger than the sum of its proper divisors (24790339).

421435457 is a wasteful number, since it uses less digits than its factorization.

421435457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24790338.

The product of its digits is 67200, while the sum is 35.

The square root of 421435457 is about 20528.8932239417. The cubic root of 421435457 is about 749.7394395622.

The spelling of 421435457 in words is "four hundred twenty-one million, four hundred thirty-five thousand, four hundred fifty-seven".