1440235042 has 4 divisors (see below), whose sum is σ = 2160352566. Its totient is φ = 720117520.

The previous prime is 1440235037. The next prime is 1440235063. The reversal of 1440235042 is 2405320441.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2405320441 = 9043 ⋅265987.

It can be written as a sum of positive squares in only one way, i.e., 775678201 + 664556841 = 27851^2 + 25779^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1440234998 and 1440235016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360058759 + ... + 360058762.

Almost surely, 2^1440235042 is an apocalyptic number.

1440235042 is a deficient number, since it is larger than the sum of its proper divisors (720117524).

1440235042 is an equidigital number, since it uses as much as digits as its factorization.

1440235042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720117523.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1440235042 is about 37950.4287459312. The cubic root of 1440235042 is about 1129.3046710343.

Adding to 1440235042 its reverse (2405320441), we get a palindrome (3845555483).

The spelling of 1440235042 in words is "one billion, four hundred forty million, two hundred thirty-five thousand, forty-two".