42072178 has 8 divisors (see below), whose sum is σ = 66820572. Its totient is φ = 19798656.

The previous prime is 42072157. The next prime is 42072193. The reversal of 42072178 is 87127024.

It can be written as a sum of positive squares in 2 ways, for example, as 41563809 + 508369 = 6447^2 + 713^2 .

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, 618675 + ... + 618742.

Almost surely, 2^42072178 is an apocalyptic number.

42072178 is a deficient number, since it is larger than the sum of its proper divisors (24748394).

42072178 is a wasteful number, since it uses less digits than its factorization.

42072178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237436.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 42072178 is about 6486.3069615922. The cubic root of 42072178 is about 347.8016716843.

The spelling of 42072178 in words is "forty-two million, seventy-two thousand, one hundred seventy-eight".