42161770 has 16 divisors (see below), whose sum is σ = 86732928. Its totient is φ = 14455440.

The previous prime is 42161723. The next prime is 42161803. The reversal of 42161770 is 7716124.

It is a super-2 number, since 2×42161770² = 3555229699065800, which contains 22 as substring.

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, 301086 + ... + 301225.

It is an arithmetic number, because the mean of its divisors is an integer number (5420808).

Almost surely, 2^42161770 is an apocalyptic number.

42161770 is an abundant number, since it is smaller than the sum of its proper divisors (44571158).

42161770 is a wasteful number, since it uses less digits than its factorization.

42161770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602325.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 42161770 is about 6493.2095299628. The cubic root of 42161770 is about 348.0483759322.

Adding to 42161770 its reverse (7716124), we get a palindrome (49877894).

The spelling of 42161770 in words is "forty-two million, one hundred sixty-one thousand, seven hundred seventy".