42397394 has 8 divisors (see below), whose sum is σ = 68488140. Its totient is φ = 19568016.

The previous prime is 42397387. The next prime is 42397409. The reversal of 42397394 is 49379324.

It can be written as a sum of positive squares in 2 ways, for example, as 42315025 + 82369 = 6505^2 + 287^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815309 + ... + 815360.

Almost surely, 2^42397394 is an apocalyptic number.

42397394 is a deficient number, since it is larger than the sum of its proper divisors (26090746).

42397394 is a wasteful number, since it uses less digits than its factorization.

42397394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630684.

The product of its digits is 163296, while the sum is 41.

The square root of 42397394 is about 6511.3281287307. The cubic root of 42397394 is about 348.6955360879.

The spelling of 42397394 in words is "forty-two million, three hundred ninety-seven thousand, three hundred ninety-four".