427020421 has 4 divisors (see below), whose sum is σ = 449495200. Its totient is φ = 404545644.

The previous prime is 427020409. The next prime is 427020469. The reversal of 427020421 is 124020724.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 427020421 - 2²⁷ = 292802693 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 427020392 and 427020401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427020491) 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, 11237361 + ... + 11237398.

It is an arithmetic number, because the mean of its divisors is an integer number (112373800).

Almost surely, 2^427020421 is an apocalyptic number.

It is an amenable number.

427020421 is a deficient number, since it is larger than the sum of its proper divisors (22474779).

427020421 is a wasteful number, since it uses less digits than its factorization.

427020421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22474778.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 427020421 is about 20664.4724345917. The cubic root of 427020421 is about 753.0368253629.

The spelling of 427020421 in words is "four hundred twenty-seven million, twenty thousand, four hundred twenty-one".