42240097 has 4 divisors (see below), whose sum is σ = 44463280. Its totient is φ = 40016916.

The previous prime is 42240089. The next prime is 42240103. The reversal of 42240097 is 79004224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42240097 - 2³ = 42240089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42240017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1111563 + ... + 1111600.

It is an arithmetic number, because the mean of its divisors is an integer number (11115820).

Almost surely, 2^42240097 is an apocalyptic number.

It is an amenable number.

42240097 is a deficient number, since it is larger than the sum of its proper divisors (2223183).

42240097 is a wasteful number, since it uses less digits than its factorization.

42240097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223182.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 42240097 is about 6499.2381861261. The cubic root of 42240097 is about 348.2637742310.

The spelling of 42240097 in words is "forty-two million, two hundred forty thousand, ninety-seven".