1440245 has 4 divisors (see below), whose sum is σ = 1728300. Its totient is φ = 1152192.

The previous prime is 1440239. The next prime is 1440247. The reversal of 1440245 is 5420441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5420441 = 13 ⋅416957.

It can be written as a sum of positive squares in 2 ways, for example, as 438244 + 1002001 = 662^2 + 1001^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440245 - 2⁸ = 1439989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440247) 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, 144020 + ... + 144029.

It is an arithmetic number, because the mean of its divisors is an integer number (432075).

2^1440245 is an apocalyptic number.

It is an amenable number.

1440245 is a deficient number, since it is larger than the sum of its proper divisors (288055).

1440245 is an equidigital number, since it uses as much as digits as its factorization.

1440245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288054.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1440245 is about 1200.1020789916. The cubic root of 1440245 is about 112.9307273755.

Adding to 1440245 its reverse (5420441), we get a palindrome (6860686).

The spelling of 1440245 in words is "one million, four hundred forty thousand, two hundred forty-five".