1440150421 has 2 divisors, whose sum is σ = 1440150422. Its totient is φ = 1440150420.

The previous prime is 1440150331. The next prime is 1440150433. The reversal of 1440150421 is 1240510441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 863478225 + 576672196 = 29385^2 + 24014^2 .

It is an emirp because it is prime and its reverse (1240510441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1440150421 - 2¹⁷ = 1440019349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1440150392 and 1440150401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1443150421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720075210 + 720075211.

It is an arithmetic number, because the mean of its divisors is an integer number (720075211).

Almost surely, 2^1440150421 is an apocalyptic number.

It is an amenable number.

1440150421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440150421 is an equidigital number, since it uses as much as digits as its factorization.

1440150421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 1440150421 is about 37949.3138409642. The cubic root of 1440150421 is about 1129.2825531717.

Adding to 1440150421 its reverse (1240510441), we get a palindrome (2680660862).

The spelling of 1440150421 in words is "one billion, four hundred forty million, one hundred fifty thousand, four hundred twenty-one".