1440124021 has 16 divisors (see below), whose sum is σ = 1718547840. Its totient is φ = 1180670400.

The previous prime is 1440123989. The next prime is 1440124067. The reversal of 1440124021 is 1204210441.

It is not a de Polignac number, because 1440124021 - 2⁵ = 1440123989 is a prime.

It is a super-2 number, since 2×1440124021² = 4147914391722416882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1440124021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440124421) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 11430 + ... + 54871.

It is an arithmetic number, because the mean of its divisors is an integer number (107409240).

Almost surely, 2^1440124021 is an apocalyptic number.

It is an amenable number.

1440124021 is a deficient number, since it is larger than the sum of its proper divisors (278423819).

1440124021 is a wasteful number, since it uses less digits than its factorization.

1440124021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66444.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1440124021 is about 37948.9660069942. The cubic root of 1440124021 is about 1129.2756526792.

Adding to 1440124021 its reverse (1204210441), we get a palindrome (2644334462).

The spelling of 1440124021 in words is "one billion, four hundred forty million, one hundred twenty-four thousand, twenty-one".