42597181 has 8 divisors (see below), whose sum is σ = 47458944. Its totient is φ = 37900320.

The previous prime is 42597161. The next prime is 42597187. The reversal of 42597181 is 18179524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42597181 is a prime.

It is a super-2 number, since 2×42597181² = 3629039658293522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42597181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42597187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40680 + ... + 41713.

It is an arithmetic number, because the mean of its divisors is an integer number (5932368).

Almost surely, 2^42597181 is an apocalyptic number.

It is an amenable number.

42597181 is a deficient number, since it is larger than the sum of its proper divisors (4861763).

42597181 is a wasteful number, since it uses less digits than its factorization.

42597181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82451.

The product of its digits is 20160, while the sum is 37.

The square root of 42597181 is about 6526.6515917429. The cubic root of 42597181 is about 349.2423911978.

It can be divided in two parts, 42597 and 181, that added together give a triangular number (42778 = T₂₉₂).

The spelling of 42597181 in words is "forty-two million, five hundred ninety-seven thousand, one hundred eighty-one".