1420720 has 80 divisors (see below), whose sum is σ = 3928320. Its totient is φ = 467712.

The previous prime is 1420717. The next prime is 1420721. The reversal of 1420720 is 270241.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1420694 and 1420703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420721) 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, 24051 + ... + 24109.

It is an arithmetic number, because the mean of its divisors is an integer number (49104).

2^1420720 is an apocalyptic number.

1420720 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 1420720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1964160).

1420720 is an abundant number, since it is smaller than the sum of its proper divisors (2507600).

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

1420720 is a wasteful number, since it uses less digits than its factorization.

1420720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 1420720 is about 1191.9395957850. The cubic root of 1420720 is about 112.4180802803.

Adding to 1420720 its reverse (270241), we get a palindrome (1690961).

The spelling of 1420720 in words is "one million, four hundred twenty thousand, seven hundred twenty".