1440231142 has 16 divisors (see below), whose sum is σ = 2535697440. Its totient is φ = 600559488.

The previous prime is 1440231127. The next prime is 1440231157. The reversal of 1440231142 is 2411320441.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1440231127) and next prime (1440231157).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1389667 + ... + 1390702.

It is an arithmetic number, because the mean of its divisors is an integer number (158481090).

Almost surely, 2^1440231142 is an apocalyptic number.

1440231142 is a deficient number, since it is larger than the sum of its proper divisors (1095466298).

1440231142 is a wasteful number, since it uses less digits than its factorization.

1440231142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2780415.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1440231142 is about 37950.3773630777. The cubic root of 1440231142 is about 1129.3036516886.

Adding to 1440231142 its reverse (2411320441), we get a palindrome (3851551583).

The spelling of 1440231142 in words is "one billion, four hundred forty million, two hundred thirty-one thousand, one hundred forty-two".