42975138 has 8 divisors (see below), whose sum is σ = 85950288. Its totient is φ = 14325044.

The previous prime is 42975089. The next prime is 42975157. The reversal of 42975138 is 83157924.

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

42975138 is an admirable number.

It is a super-2 number, since 2×42975138² = 3693724972238088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42975096 and 42975105.

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, 3581256 + ... + 3581267.

It is an arithmetic number, because the mean of its divisors is an integer number (10743786).

Almost surely, 2^42975138 is an apocalyptic number.

42975138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42975138 is a wasteful number, since it uses less digits than its factorization.

42975138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7162528.

The product of its digits is 60480, while the sum is 39.

The square root of 42975138 is about 6555.5425404767. The cubic root of 42975138 is about 350.2722724922.

The spelling of 42975138 in words is "forty-two million, nine hundred seventy-five thousand, one hundred thirty-eight".