1440130621 has 2 divisors, whose sum is σ = 1440130622. Its totient is φ = 1440130620.

The previous prime is 1440130607. The next prime is 1440130649. The reversal of 1440130621 is 1260310441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1366411225 + 73719396 = 36965^2 + 8586^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440130621 - 2¹³ = 1440122429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1440130592 and 1440130601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1440130651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720065310 + 720065311.

It is an arithmetic number, because the mean of its divisors is an integer number (720065311).

Almost surely, 2^1440130621 is an apocalyptic number.

It is an amenable number.

1440130621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440130621 is an equidigital number, since it uses as much as digits as its factorization.

1440130621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1440130621 is about 37949.0529657856. The cubic root of 1440130621 is about 1129.2773778102.

The spelling of 1440130621 in words is "one billion, four hundred forty million, one hundred thirty thousand, six hundred twenty-one".