42178922 has 8 divisors (see below), whose sum is σ = 63316836. Its totient is φ = 21073312.

The previous prime is 42178919. The next prime is 42178949. The reversal of 42178922 is 22987124.

It can be written as a sum of positive squares in 2 ways, for example, as 42003361 + 175561 = 6481^2 + 419^2 .

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

It is a super-2 number, since 2×42178922² = 3558122922164168, which contains 22 as substring.

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, 4493 + ... + 10224.

Almost surely, 2^42178922 is an apocalyptic number.

42178922 is a deficient number, since it is larger than the sum of its proper divisors (21137914).

42178922 is a wasteful number, since it uses less digits than its factorization.

42178922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16152.

The product of its digits is 16128, while the sum is 35.

The square root of 42178922 is about 6494.5301600655. The cubic root of 42178922 is about 348.0955665222.

The spelling of 42178922 in words is "forty-two million, one hundred seventy-eight thousand, nine hundred twenty-two".