422786421 has 6 divisors (see below), whose sum is σ = 610691510. Its totient is φ = 281857608.

The previous prime is 422786417. The next prime is 422786453. The reversal of 422786421 is 124687224.

422786421 is a `hidden beast` number, since 4 + 2 + 2 + 7 + 8 + 642 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 298909521 + 123876900 = 17289^2 + 11130^2 .

It is not a de Polignac number, because 422786421 - 2² = 422786417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422786411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23488126 + ... + 23488143.

Almost surely, 2^422786421 is an apocalyptic number.

It is an amenable number.

422786421 is a deficient number, since it is larger than the sum of its proper divisors (187905089).

422786421 is a wasteful number, since it uses less digits than its factorization.

422786421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46976275 (or 46976272 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 422786421 is about 20561.7708624525. The cubic root of 422786421 is about 750.5397128536.

The spelling of 422786421 in words is "four hundred twenty-two million, seven hundred eighty-six thousand, four hundred twenty-one".