842420626 has 8 divisors (see below), whose sum is σ = 1264555404. Its totient is φ = 420902160.

The previous prime is 842420617. The next prime is 842420627. The reversal of 842420626 is 626024248.

It can be written as a sum of positive squares in 2 ways, for example, as 826620001 + 15800625 = 28751^2 + 3975^2 .

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

It is a super-2 number, since 2×842420626² = 1419345022220463752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 842420591 and 842420600.

It is not an unprimeable number, because it can be changed into a prime (842420627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150645 + ... + 156136.

Almost surely, 2^842420626 is an apocalyptic number.

842420626 is a deficient number, since it is larger than the sum of its proper divisors (422134778).

842420626 is a wasteful number, since it uses less digits than its factorization.

842420626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308156.

The product of its (nonzero) digits is 36864, while the sum is 34.

The square root of 842420626 is about 29024.4832167603. The cubic root of 842420626 is about 944.4442580310. Note that the first 3 decimals are identical.

The spelling of 842420626 in words is "eight hundred forty-two million, four hundred twenty thousand, six hundred twenty-six".