1404220 has 24 divisors (see below), whose sum is σ = 2999808. Its totient is φ = 552000.

The previous prime is 1404211. The next prime is 1404229. The reversal of 1404220 is 224041.

It is an interprime number because it is at equal distance from previous prime (1404211) and next prime (1404229).

It is a self number, because there is not a number n which added to its sum of digits gives 1404220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1404229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 645 + ... + 1795.

It is an arithmetic number, because the mean of its divisors is an integer number (124992).

2^1404220 is an apocalyptic number.

1404220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1404220 is an abundant number, since it is smaller than the sum of its proper divisors (1595588).

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

1404220 is a wasteful number, since it uses less digits than its factorization.

1404220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221 (or 1219 counting only the distinct ones).

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

The square root of 1404220 is about 1184.9978902935. The cubic root of 1404220 is about 111.9811830633.

Adding to 1404220 its reverse (224041), we get a palindrome (1628261).

The spelling of 1404220 in words is "one million, four hundred four thousand, two hundred twenty".