1440442 has 4 divisors (see below), whose sum is σ = 2160666. Its totient is φ = 720220.

The previous prime is 1440437. The next prime is 1440443. The reversal of 1440442 is 2440441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2440441 = 569 ⋅4289.

It can be written as a sum of positive squares in only one way, i.e., 1125721 + 314721 = 1061^2 + 561^2 .

It is not an unprimeable number, because it can be changed into a prime (1440443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360109 + ... + 360112.

2^1440442 is an apocalyptic number.

1440442 is a deficient number, since it is larger than the sum of its proper divisors (720224).

1440442 is an equidigital number, since it uses as much as digits as its factorization.

1440442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720223.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 1440442 is about 1200.1841525366. The cubic root of 1440442 is about 112.9358761150.

Adding to 1440442 its reverse (2440441), we get a palindrome (3880883).

Subtracting 1440442 from its reverse (2440441), we obtain a palindrome (999999).

The spelling of 1440442 in words is "one million, four hundred forty thousand, four hundred forty-two".