671605042 has 8 divisors (see below), whose sum is σ = 1007525376. Its totient is φ = 335763252.

The previous prime is 671604979. The next prime is 671605069. The reversal of 671605042 is 240506176.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 671604995 and 671605013.

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, 11823 + ... + 38509.

It is an arithmetic number, because the mean of its divisors is an integer number (125940672).

Almost surely, 2^671605042 is an apocalyptic number.

671605042 is a deficient number, since it is larger than the sum of its proper divisors (335920334).

671605042 is a wasteful number, since it uses less digits than its factorization.

671605042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39272.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 671605042 is about 25915.3437561611. The cubic root of 671605042 is about 875.7321945346.

The spelling of 671605042 in words is "six hundred seventy-one million, six hundred five thousand, forty-two".