1021345453 has 2 divisors, whose sum is σ = 1021345454. Its totient is φ = 1021345452.

The previous prime is 1021345439. The next prime is 1021345471. The reversal of 1021345453 is 3545431201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 964599364 + 56746089 = 31058^2 + 7533^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021345453 - 2⁵ = 1021345421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021345433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510672726 + 510672727.

It is an arithmetic number, because the mean of its divisors is an integer number (510672727).

Almost surely, 2^1021345453 is an apocalyptic number.

It is an amenable number.

1021345453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021345453 is an equidigital number, since it uses as much as digits as its factorization.

1021345453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1021345453 is about 31958.4957875054. The cubic root of 1021345453 is about 1007.0651175600.

Adding to 1021345453 its reverse (3545431201), we get a palindrome (4566776654).

The spelling of 1021345453 in words is "one billion, twenty-one million, three hundred forty-five thousand, four hundred fifty-three".