671247442 has 4 divisors (see below), whose sum is σ = 1006871166. Its totient is φ = 335623720.

The previous prime is 671247391. The next prime is 671247463. The reversal of 671247442 is 244742176.

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., 670861801 + 385641 = 25901^2 + 621^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167811859 + ... + 167811862.

Almost surely, 2^671247442 is an apocalyptic number.

671247442 is a deficient number, since it is larger than the sum of its proper divisors (335623724).

671247442 is a wasteful number, since it uses less digits than its factorization.

671247442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335623723.

The product of its digits is 75264, while the sum is 37.

The square root of 671247442 is about 25908.4434499643. The cubic root of 671247442 is about 875.5767373779.

The spelling of 671247442 in words is "six hundred seventy-one million, two hundred forty-seven thousand, four hundred forty-two".