1440356141 has 4 divisors (see below), whose sum is σ = 1646121312. Its totient is φ = 1234590972.

The previous prime is 1440356111. The next prime is 1440356147. The reversal of 1440356141 is 1416530441.

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 an emirpimes, since its reverse is a distinct semiprime: 1416530441 = 127 ⋅11153783.

It is a cyclic number.

It is not a de Polignac number, because 1440356141 - 2¹⁸ = 1440093997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440356147) 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 3 ways as a sum of consecutive naturals, for example, 102882575 + ... + 102882588.

It is an arithmetic number, because the mean of its divisors is an integer number (411530328).

Almost surely, 2^1440356141 is an apocalyptic number.

It is an amenable number.

1440356141 is a deficient number, since it is larger than the sum of its proper divisors (205765171).

1440356141 is an equidigital number, since it uses as much as digits as its factorization.

1440356141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205765170.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1440356141 is about 37952.0242016154. The cubic root of 1440356141 is about 1129.3363218481.

Adding to 1440356141 its reverse (1416530441), we get a palindrome (2856886582).

The spelling of 1440356141 in words is "one billion, four hundred forty million, three hundred fifty-six thousand, one hundred forty-one".