42190791 has 8 divisors (see below), whose sum is σ = 56289264. Its totient is φ = 28109760.

The previous prime is 42190769. The next prime is 42190847. The reversal of 42190791 is 19709124.

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

It is not a de Polignac number, because 42190791 - 2⁷ = 42190663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42190751) 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, 3121 + ... + 9701.

It is an arithmetic number, because the mean of its divisors is an integer number (7036158).

Almost surely, 2^42190791 is an apocalyptic number.

42190791 is a deficient number, since it is larger than the sum of its proper divisors (14098473).

42190791 is a wasteful number, since it uses less digits than its factorization.

42190791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8721.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 42190791 is about 6495.4438647409. The cubic root of 42190791 is about 348.1282144153.

The spelling of 42190791 in words is "forty-two million, one hundred ninety thousand, seven hundred ninety-one".