8420122 has 4 divisors (see below), whose sum is σ = 12630186. Its totient is φ = 4210060.

The previous prime is 8420119. The next prime is 8420123. The reversal of 8420122 is 2210248.

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., 7778521 + 641601 = 2789^2 + 801^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8420122.

It is not an unprimeable number, because it can be changed into a prime (8420123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2105029 + ... + 2105032.

Almost surely, 2^8420122 is an apocalyptic number.

8420122 is a deficient number, since it is larger than the sum of its proper divisors (4210064).

8420122 is a wasteful number, since it uses less digits than its factorization.

8420122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210063.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 8420122 is about 2901.7446476215. The cubic root of 8420122 is about 203.4414588113.

The spelling of 8420122 in words is "eight million, four hundred twenty thousand, one hundred twenty-two".