421280166 has 32 divisors (see below), whose sum is σ = 867591648. Its totient is φ = 136290560.

The previous prime is 421280147. The next prime is 421280177. The reversal of 421280166 is 661082124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44116 + ... + 52808.

It is an arithmetic number, because the mean of its divisors is an integer number (27112239).

Almost surely, 2^421280166 is an apocalyptic number.

421280166 is an abundant number, since it is smaller than the sum of its proper divisors (446311482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421280166 is a wasteful number, since it uses less digits than its factorization.

421280166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8936.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 421280166 is about 20525.1106208956. The cubic root of 421280166 is about 749.6473399783.

The spelling of 421280166 in words is "four hundred twenty-one million, two hundred eighty thousand, one hundred sixty-six".