1420740 has 60 divisors (see below), whose sum is σ = 4461996. Its totient is φ = 378432.

The previous prime is 1420729. The next prime is 1420753. The reversal of 1420740 is 470241.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 876096 + 544644 = 936^2 + 738^2 .

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a zygodrome in base 3.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 1182 + ... + 2058.

2^1420740 is an apocalyptic number.

1420740 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 1420740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2230998).

1420740 is an abundant number, since it is smaller than the sum of its proper divisors (3041256).

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

1420740 is a wasteful number, since it uses less digits than its factorization.

1420740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898 (or 887 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 1420740 is about 1191.9479854423. The cubic root of 1420740 is about 112.4186077947.

Adding to 1420740 its reverse (470241), we get a palindrome (1890981).

The spelling of 1420740 in words is "one million, four hundred twenty thousand, seven hundred forty".