164971842 has 32 divisors (see below), whose sum is σ = 399261312. Its totient is φ = 44361984.

The previous prime is 164971831. The next prime is 164971853. The reversal of 164971842 is 248179461.

It is an interprime number because it is at equal distance from previous prime (164971831) and next prime (164971853).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 164971794 and 164971803.

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, 114813 + ... + 116240.

It is an arithmetic number, because the mean of its divisors is an integer number (12476916).

Almost surely, 2^164971842 is an apocalyptic number.

164971842 is an abundant number, since it is smaller than the sum of its proper divisors (234289470).

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

164971842 is a wasteful number, since it uses less digits than its factorization.

164971842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231082.

The product of its digits is 96768, while the sum is 42.

The square root of 164971842 is about 12844.1364832362. The cubic root of 164971842 is about 548.4494532293.

The spelling of 164971842 in words is "one hundred sixty-four million, nine hundred seventy-one thousand, eight hundred forty-two".