42161919 has 8 divisors (see below), whose sum is σ = 57137712. Its totient is φ = 27647040.

The previous prime is 42161869. The next prime is 42161927. The reversal of 42161919 is 91916124.

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

It is not a de Polignac number, because 42161919 - 2¹² = 42157823 is a prime.

It is a super-2 number, since 2×42161919² = 3555254827525122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42161919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42161929) 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, 115014 + ... + 115379.

It is an arithmetic number, because the mean of its divisors is an integer number (7142214).

Almost surely, 2^42161919 is an apocalyptic number.

42161919 is a deficient number, since it is larger than the sum of its proper divisors (14975793).

42161919 is a wasteful number, since it uses less digits than its factorization.

42161919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230457.

The product of its digits is 3888, while the sum is 33.

The square root of 42161919 is about 6493.2210034774. The cubic root of 42161919 is about 348.0487859336.

The spelling of 42161919 in words is "forty-two million, one hundred sixty-one thousand, nine hundred nineteen".