42161364 has 144 divisors (see below), whose sum is σ = 131765760. Its totient is φ = 11612160.

The previous prime is 42161359. The next prime is 42161393. The reversal of 42161364 is 46316124.

42161364 is a `hidden beast` number, since 42 + 1 + 613 + 6 + 4 = 666.

It is a super-2 number, since 2×42161364² = 3555161228680992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 163924 + ... + 164180.

It is an arithmetic number, because the mean of its divisors is an integer number (915040).

Almost surely, 2^42161364 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42161364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65882880).

42161364 is an abundant number, since it is smaller than the sum of its proper divisors (89604396).

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

42161364 is a wasteful number, since it uses less digits than its factorization.

42161364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 300 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 42161364 is about 6493.1782664578. The cubic root of 42161364 is about 348.0472587424.

Adding to 42161364 its reverse (46316124), we get a palindrome (88477488).

The spelling of 42161364 in words is "forty-two million, one hundred sixty-one thousand, three hundred sixty-four".