1422642 has 48 divisors (see below), whose sum is σ = 3267648. Its totient is φ = 411840.

The previous prime is 1422637. The next prime is 1422647. The reversal of 1422642 is 2462241.

It is an interprime number because it is at equal distance from previous prime (1422637) and next prime (1422647).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1422647) 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 23 ways as a sum of consecutive naturals, for example, 23292 + ... + 23352.

It is an arithmetic number, because the mean of its divisors is an integer number (68076).

2^1422642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1422642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1633824).

1422642 is an abundant number, since it is smaller than the sum of its proper divisors (1845006).

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

1422642 is a wasteful number, since it uses less digits than its factorization.

1422642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 102 counting only the distinct ones).

The product of its digits is 768, while the sum is 21.

The square root of 1422642 is about 1192.7455721989. The cubic root of 1422642 is about 112.4687518151.

Adding to 1422642 its reverse (2462241), we get a palindrome (3884883).

The spelling of 1422642 in words is "one million, four hundred twenty-two thousand, six hundred forty-two".