42097791 has 8 divisors (see below), whose sum is σ = 56257200. Its totient is φ = 28001792.

The previous prime is 42097789. The next prime is 42097807. The reversal of 42097791 is 19779024.

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

It is a cyclic number.

It is not a de Polignac number, because 42097791 - 2¹ = 42097789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42097591) 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, 14280 + ... + 16973.

It is an arithmetic number, because the mean of its divisors is an integer number (7032150).

Almost surely, 2^42097791 is an apocalyptic number.

42097791 is a deficient number, since it is larger than the sum of its proper divisors (14159409).

42097791 is a wasteful number, since it uses less digits than its factorization.

42097791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31705.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 42097791 is about 6488.2810512492. The cubic root of 42097791 is about 347.8722364258.

The spelling of 42097791 in words is "forty-two million, ninety-seven thousand, seven hundred ninety-one".