421982 has 8 divisors (see below), whose sum is σ = 690552. Its totient is φ = 191800.

The previous prime is 421973. The next prime is 421987. The reversal of 421982 is 289124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421987) 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, 9569 + ... + 9612.

It is an arithmetic number, because the mean of its divisors is an integer number (86319).

2⁴²¹⁹⁸² is an apocalyptic number.

421982 is a deficient number, since it is larger than the sum of its proper divisors (268570).

421982 is a wasteful number, since it uses less digits than its factorization.

421982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19194.

The product of its digits is 1152, while the sum is 26.

The square root of 421982 is about 649.6014162546. The cubic root of 421982 is about 75.0063402047.

The spelling of 421982 in words is "four hundred twenty-one thousand, nine hundred eighty-two".