8420234 has 8 divisors (see below), whose sum is σ = 12674340. Its totient is φ = 4195456.

The previous prime is 8420233. The next prime is 8420239. The reversal of 8420234 is 4320248.

It can be written as a sum of positive squares in 2 ways, for example, as 7546009 + 874225 = 2747^2 + 935^2 .

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

It is a super-2 number, since 2×8420234² = 141800681229512, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8420233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6599 + ... + 7770.

Almost surely, 2^8420234 is an apocalyptic number.

8420234 is a deficient number, since it is larger than the sum of its proper divisors (4254106).

8420234 is a wasteful number, since it uses less digits than its factorization.

8420234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14664.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 8420234 is about 2901.7639462920. The cubic root of 8420234 is about 203.4423608308.

The spelling of 8420234 in words is "eight million, four hundred twenty thousand, two hundred thirty-four".