42155066 has 8 divisors (see below), whose sum is σ = 63312084. Its totient is φ = 21051040.

The previous prime is 42155063. The next prime is 42155089. The reversal of 42155066 is 66055124.

It can be written as a sum of positive squares in 2 ways, for example, as 41925625 + 229441 = 6475^2 + 479^2 .

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

It is not an unprimeable number, because it can be changed into a prime (42155063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11195 + ... + 14478.

Almost surely, 2^42155066 is an apocalyptic number.

42155066 is a deficient number, since it is larger than the sum of its proper divisors (21157018).

42155066 is a wasteful number, since it uses less digits than its factorization.

42155066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26496.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 42155066 is about 6492.6932778316. The cubic root of 42155066 is about 348.0299276239.

The spelling of 42155066 in words is "forty-two million, one hundred fifty-five thousand, sixty-six".