1440266 has 4 divisors (see below), whose sum is σ = 2160402. Its totient is φ = 720132.

The previous prime is 1440259. The next prime is 1440269. The reversal of 1440266 is 6620441.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 990025 + 450241 = 995^2 + 671^2 .

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (1440269) 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 as a sum of consecutive naturals, namely, 360065 + ... + 360068.

2^1440266 is an apocalyptic number.

1440266 is a deficient number, since it is larger than the sum of its proper divisors (720136).

1440266 is an equidigital number, since it uses as much as digits as its factorization.

1440266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720135.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1440266 is about 1200.1108282155. The cubic root of 1440266 is about 112.9312762483.

The spelling of 1440266 in words is "one million, four hundred forty thousand, two hundred sixty-six".