1404720 has 60 divisors (see below), whose sum is σ = 4719936. Its totient is φ = 374400.

The previous prime is 1404709. The next prime is 1404721. The reversal of 1404720 is 274041.

It is a happy number.

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 junction number, because it is equal to n+sod(n) for n = 1404693 and 1404702.

It is not an unprimeable number, because it can be changed into a prime (1404721) 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 11 ways as a sum of consecutive naturals, for example, 256 + ... + 1695.

2^1404720 is an apocalyptic number.

1404720 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 1404720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2359968).

1404720 is an abundant number, since it is smaller than the sum of its proper divisors (3315216).

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

1404720 is a wasteful number, since it uses less digits than its factorization.

1404720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970 (or 1961 counting only the distinct ones).

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

The square root of 1404720 is about 1185.2088423565. The cubic root of 1404720 is about 111.9944725163.

Adding to 1404720 its reverse (274041), we get a palindrome (1678761).

The spelling of 1404720 in words is "one million, four hundred four thousand, seven hundred twenty".