42278297 has 4 divisors (see below), whose sum is σ = 42696996. Its totient is φ = 41859600.

The previous prime is 42278267. The next prime is 42278321. The reversal of 42278297 is 79287224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38576521 + 3701776 = 6211^2 + 1924^2 .

It is a cyclic number.

It is not a de Polignac number, because 42278297 - 2¹² = 42274201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42278227) 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, 209198 + ... + 209399.

It is an arithmetic number, because the mean of its divisors is an integer number (10674249).

Almost surely, 2^42278297 is an apocalyptic number.

It is an amenable number.

42278297 is a deficient number, since it is larger than the sum of its proper divisors (418699).

42278297 is a wasteful number, since it uses less digits than its factorization.

42278297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418698.

The product of its digits is 112896, while the sum is 41.

The square root of 42278297 is about 6502.1763279690. The cubic root of 42278297 is about 348.3687271764.

The spelling of 42278297 in words is "forty-two million, two hundred seventy-eight thousand, two hundred ninety-seven".