842684426 has 4 divisors (see below), whose sum is σ = 1264026642. Its totient is φ = 421342212.

The previous prime is 842684417. The next prime is 842684431. The reversal of 842684426 is 624486248.

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., 595408801 + 247275625 = 24401^2 + 15725^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210671105 + ... + 210671108.

Almost surely, 2^842684426 is an apocalyptic number.

842684426 is a deficient number, since it is larger than the sum of its proper divisors (421342216).

842684426 is a wasteful number, since it uses less digits than its factorization.

842684426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421342215.

The product of its digits is 589824, while the sum is 44.

The square root of 842684426 is about 29029.0273002731. The cubic root of 842684426 is about 944.5428304804.

The spelling of 842684426 in words is "eight hundred forty-two million, six hundred eighty-four thousand, four hundred twenty-six".