670420042 has 4 divisors (see below), whose sum is σ = 1005630066. Its totient is φ = 335210020.

The previous prime is 670420033. The next prime is 670420067. The reversal of 670420042 is 240024076.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 366301321 + 304118721 = 19139^2 + 17439^2 .

It is a junction number, because it is equal to n+sod(n) for n = 670419989 and 670420016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167605009 + ... + 167605012.

Almost surely, 2^670420042 is an apocalyptic number.

670420042 is a deficient number, since it is larger than the sum of its proper divisors (335210024).

670420042 is a wasteful number, since it uses less digits than its factorization.

670420042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335210023.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 670420042 is about 25892.4707588905. The cubic root of 670420042 is about 875.2168352952.

The spelling of 670420042 in words is "six hundred seventy million, four hundred twenty thousand, forty-two".