1422740 has 48 divisors (see below), whose sum is σ = 3386880. Its totient is φ = 497280.

The previous prime is 1422727. The next prime is 1422749. The reversal of 1422740 is 472241.

1422740 = T₉₅ + T₉₆ + ... + T₂₁₀.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1422749) 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 15 ways as a sum of consecutive naturals, for example, 6269 + ... + 6491.

It is an arithmetic number, because the mean of its divisors is an integer number (70560).

2^1422740 is an apocalyptic number.

1422740 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 1422740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1693440).

1422740 is an abundant number, since it is smaller than the sum of its proper divisors (1964140).

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

1422740 is a wasteful number, since it uses less digits than its factorization.

1422740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 1422740 is about 1192.7866531782. The cubic root of 1422740 is about 112.4713342602.

Adding to 1422740 its reverse (472241), we get a palindrome (1894981).

It can be divided in two parts, 142 and 2740, that added together give a palindrome (2882).

The spelling of 1422740 in words is "one million, four hundred twenty-two thousand, seven hundred forty".