1422540 has 72 divisors (see below), whose sum is σ = 4935840. Its totient is φ = 324864.

The previous prime is 1422523. The next prime is 1422541. The reversal of 1422540 is 452241.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1422541) 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, 696 + ... + 1824.

2^1422540 is an apocalyptic number.

1422540 is a gapful number since it is divisible by the number (10) 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 1422540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2467920).

1422540 is an abundant number, since it is smaller than the sum of its proper divisors (3513300).

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

1422540 is a wasteful number, since it uses less digits than its factorization.

1422540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151 (or 1146 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1422540 is about 1192.7028129421. The cubic root of 1422540 is about 112.4660638381.

Adding to 1422540 its reverse (452241), we get a palindrome (1874781).

Subtracting from 1422540 its reverse (452241), we obtain a cube (970299 = 99³).

The spelling of 1422540 in words is "one million, four hundred twenty-two thousand, five hundred forty".