1422624 has 96 divisors (see below), whose sum is σ = 4475520. Its totient is φ = 387072.

The previous prime is 1422601. The next prime is 1422637. The reversal of 1422624 is 4262241.

1422624 = 102² + 103² + ... + 174².

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1422624.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19452 + ... + 19524.

It is an arithmetic number, because the mean of its divisors is an integer number (46620).

2^1422624 is an apocalyptic number.

1422624 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1422624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2237760).

1422624 is an abundant number, since it is smaller than the sum of its proper divisors (3052896).

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

1422624 is a wasteful number, since it uses less digits than its factorization.

1422624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 114 counting only the distinct ones).

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

The square root of 1422624 is about 1192.7380265591. The cubic root of 1422624 is about 112.4682774755.

Adding to 1422624 its reverse (4262241), we get a palindrome (5684865).

The spelling of 1422624 in words is "one million, four hundred twenty-two thousand, six hundred twenty-four".