1440420403 has 2 divisors, whose sum is σ = 1440420404. Its totient is φ = 1440420402.

The previous prime is 1440420341. The next prime is 1440420433. The reversal of 1440420403 is 3040240441.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1440420403 - 2²¹ = 1438323251 is a prime.

It is not a weakly prime, because it can be changed into another prime (1440420433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720210201 + 720210202.

It is an arithmetic number, because the mean of its divisors is an integer number (720210202).

Almost surely, 2^1440420403 is an apocalyptic number.

1440420403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440420403 is an equidigital number, since it uses as much as digits as its factorization.

1440420403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1440420403 is about 37952.8708136815. The cubic root of 1440420403 is about 1129.3531168451.

Adding to 1440420403 its reverse (3040240441), we get a palindrome (4480660844).

The spelling of 1440420403 in words is "one billion, four hundred forty million, four hundred twenty thousand, four hundred three".