1422666 has 36 divisors (see below), whose sum is σ = 3587922. Its totient is φ = 406224.

The previous prime is 1422661. The next prime is 1422671. The reversal of 1422666 is 6662241.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1422661) and next prime (1422671).

It can be written as a sum of positive squares in only one way, i.e., 1147041 + 275625 = 1071^2 + 525^2 .

It is not an unprimeable number, because it can be changed into a prime (1422661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 76 + ... + 1688.

2^1422666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1422666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1793961).

1422666 is an abundant number, since it is smaller than the sum of its proper divisors (2165256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1422666 is a wasteful number, since it uses less digits than its factorization.

1422666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635 (or 1625 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 1422666 is about 1192.7556329777. The cubic root of 1422666 is about 112.4693842616.

The spelling of 1422666 in words is "one million, four hundred twenty-two thousand, six hundred sixty-six".