164421942 has 16 divisors (see below), whose sum is σ = 333476352. Its totient is φ = 54035240.

The previous prime is 164421919. The next prime is 164421973. The reversal of 164421942 is 249124461.

164421942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×164421942³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192558 + ... + 193409.

It is an arithmetic number, because the mean of its divisors is an integer number (20842272).

Almost surely, 2^164421942 is an apocalyptic number.

164421942 is an abundant number, since it is smaller than the sum of its proper divisors (169054410).

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

164421942 is a wasteful number, since it uses less digits than its factorization.

164421942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386043.

The product of its digits is 13824, while the sum is 33.

The square root of 164421942 is about 12822.7119596441. The cubic root of 164421942 is about 547.8393934125.

The spelling of 164421942 in words is "one hundred sixty-four million, four hundred twenty-one thousand, nine hundred forty-two".