1040020453 has 2 divisors, whose sum is σ = 1040020454. Its totient is φ = 1040020452.

The previous prime is 1040020439. The next prime is 1040020459. The reversal of 1040020453 is 3540200401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 824723524 + 215296929 = 28718^2 + 14673^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1040020453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1040020453.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040020459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520010226 + 520010227.

It is an arithmetic number, because the mean of its divisors is an integer number (520010227).

Almost surely, 2^1040020453 is an apocalyptic number.

It is an amenable number.

1040020453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040020453 is an equidigital number, since it uses as much as digits as its factorization.

1040020453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 1040020453 is about 32249.3481019384. The cubic root of 1040020453 is about 1013.1660454912.

Adding to 1040020453 its reverse (3540200401), we get a palindrome (4580220854).

The spelling of 1040020453 in words is "one billion, forty million, twenty thousand, four hundred fifty-three".