42161764 has 12 divisors (see below), whose sum is σ = 73839024. Its totient is φ = 21064904.

The previous prime is 42161723. The next prime is 42161803. The reversal of 42161764 is 46716124.

It is a super-2 number, since 2×42161764² = 3555228687183392, which contains 22 as substring.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 3507 + ... + 9829.

It is an arithmetic number, because the mean of its divisors is an integer number (6153252).

Almost surely, 2^42161764 is an apocalyptic number.

It is an amenable number.

42161764 is a deficient number, since it is larger than the sum of its proper divisors (31677260).

42161764 is a wasteful number, since it uses less digits than its factorization.

42161764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7994 (or 7992 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 42161764 is about 6493.2090679417. The cubic root of 42161764 is about 348.0483594221.

Adding to 42161764 its reverse (46716124), we get a palindrome (88877888).

The spelling of 42161764 in words is "forty-two million, one hundred sixty-one thousand, seven hundred sixty-four".