1440240101 has 4 divisors (see below), whose sum is σ = 1440338592. Its totient is φ = 1440141612.

The previous prime is 1440240089. The next prime is 1440240121. The reversal of 1440240101 is 1010420441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1010420441 = 41 ⋅24644401.

It is a cyclic number.

It is not a de Polignac number, because 1440240101 - 2¹⁰ = 1440239077 is a prime.

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 1440240101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440240121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22451 + ... + 58176.

It is an arithmetic number, because the mean of its divisors is an integer number (360084648).

Almost surely, 2^1440240101 is an apocalyptic number.

It is an amenable number.

1440240101 is a deficient number, since it is larger than the sum of its proper divisors (98491).

1440240101 is an equidigital number, since it uses as much as digits as its factorization.

1440240101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98490.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1440240101 is about 37950.4953986111. The cubic root of 1440240101 is about 1129.3059933059.

Adding to 1440240101 its reverse (1010420441), we get a palindrome (2450660542).

The spelling of 1440240101 in words is "one billion, four hundred forty million, two hundred forty thousand, one hundred one".