421925986 has 4 divisors (see below), whose sum is σ = 632888982. Its totient is φ = 210962992.

The previous prime is 421925983. The next prime is 421926073. The reversal of 421925986 is 689529124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 345030625 + 76895361 = 18575^2 + 8769^2 .

It is not an unprimeable number, because it can be changed into a prime (421925981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105481495 + ... + 105481498.

Almost surely, 2^421925986 is an apocalyptic number.

421925986 is a deficient number, since it is larger than the sum of its proper divisors (210962996).

421925986 is a wasteful number, since it uses less digits than its factorization.

421925986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210962995.

The product of its digits is 311040, while the sum is 46.

The square root of 421925986 is about 20540.8370326041. The cubic root of 421925986 is about 750.0302127088.

The spelling of 421925986 in words is "four hundred twenty-one million, nine hundred twenty-five thousand, nine hundred eighty-six".