1420420 has 48 divisors (see below), whose sum is σ = 3225600. Its totient is φ = 524160.

The previous prime is 1420403. The next prime is 1420429. The reversal of 1420420 is 240241.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 1420420.

It is not an unprimeable number, because it can be changed into a prime (1420429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17941 + ... + 18019.

It is an arithmetic number, because the mean of its divisors is an integer number (67200).

2^1420420 is an apocalyptic number.

1420420 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 1420420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1612800).

1420420 is an abundant number, since it is smaller than the sum of its proper divisors (1805180).

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

1420420 is a wasteful number, since it uses less digits than its factorization.

1420420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 1420420 is about 1191.8137438375. The cubic root of 1420420 is about 112.4101669691.

Adding to 1420420 its reverse (240241), we get a palindrome (1660661).

The spelling of 1420420 in words is "one million, four hundred twenty thousand, four hundred twenty".