42155770 has 8 divisors (see below), whose sum is σ = 75880404. Its totient is φ = 16862304.

The previous prime is 42155761. The next prime is 42155807. The reversal of 42155770 is 7755124.

It can be written as a sum of positive squares in 2 ways, for example, as 41434969 + 720801 = 6437^2 + 849^2 .

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, 2107779 + ... + 2107798.

Almost surely, 2^42155770 is an apocalyptic number.

42155770 is a deficient number, since it is larger than the sum of its proper divisors (33724634).

42155770 is a wasteful number, since it uses less digits than its factorization.

42155770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4215584.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 42155770 is about 6492.7474923949. The cubic root of 42155770 is about 348.0318650083.

The spelling of 42155770 in words is "forty-two million, one hundred fifty-five thousand, seven hundred seventy".