1404945 has 20 divisors (see below), whose sum is σ = 2519220. Its totient is φ = 749088.

The previous prime is 1404937. The next prime is 1404959. The reversal of 1404945 is 5494041.

It can be written as a sum of positive squares in 2 ways, for example, as 219024 + 1185921 = 468^2 + 1089^2 .

It is not a de Polignac number, because 1404945 - 2³ = 1404937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1330 + ... + 2139.

It is an arithmetic number, because the mean of its divisors is an integer number (125961).

2^1404945 is an apocalyptic number.

1404945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1404945 is a deficient number, since it is larger than the sum of its proper divisors (1114275).

1404945 is an equidigital number, since it uses as much as digits as its factorization.

1404945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3486 (or 3477 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1404945 is about 1185.3037585362. The cubic root of 1404945 is about 112.0004517414. Note that the first 3 decimals are identical.

Adding to 1404945 its reverse (5494041), we get a palindrome (6898986).

The spelling of 1404945 in words is "one million, four hundred four thousand, nine hundred forty-five".