42685394 has 4 divisors (see below), whose sum is σ = 64028094. Its totient is φ = 21342696.

The previous prime is 42685337. The next prime is 42685417. The reversal of 42685394 is 49358624.

42685394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 40005625 + 2679769 = 6325^2 + 1637^2 .

It is a super-3 number, since 3×42685394³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10671347 + ... + 10671350.

Almost surely, 2^42685394 is an apocalyptic number.

42685394 is a deficient number, since it is larger than the sum of its proper divisors (21342700).

42685394 is a wasteful number, since it uses less digits than its factorization.

42685394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21342699.

The product of its digits is 207360, while the sum is 41.

The square root of 42685394 is about 6533.4060029972. The cubic root of 42685394 is about 349.4833028932.

The spelling of 42685394 in words is "forty-two million, six hundred eighty-five thousand, three hundred ninety-four".