1404421 has 4 divisors (see below), whose sum is σ = 1487052. Its totient is φ = 1321792.

The previous prime is 1404419. The next prime is 1404427. The reversal of 1404421 is 1244041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1079521 + 324900 = 1039^2 + 570^2 .

It is a cyclic number.

It is not a de Polignac number, because 1404421 - 2¹ = 1404419 is a prime.

It is a Duffinian number.

1404421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1404395 and 1404404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1404427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41290 + ... + 41323.

It is an arithmetic number, because the mean of its divisors is an integer number (371763).

2^1404421 is an apocalyptic number.

It is an amenable number.

1404421 is a deficient number, since it is larger than the sum of its proper divisors (82631).

1404421 is an equidigital number, since it uses as much as digits as its factorization.

1404421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82630.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1404421 is about 1185.0826975363. The cubic root of 1404421 is about 111.9865258025.

Adding to 1404421 its reverse (1244041), we get a palindrome (2648462).

The spelling of 1404421 in words is "one million, four hundred four thousand, four hundred twenty-one".