1021451603 has 2 divisors, whose sum is σ = 1021451604. Its totient is φ = 1021451602.

The previous prime is 1021451569. The next prime is 1021451621. The reversal of 1021451603 is 3061541201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021451603 - 2⁶ = 1021451539 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1021451803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510725801 + 510725802.

It is an arithmetic number, because the mean of its divisors is an integer number (510725802).

Almost surely, 2^1021451603 is an apocalyptic number.

1021451603 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021451603 is an equidigital number, since it uses as much as digits as its factorization.

1021451603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1021451603 is about 31960.1564921075. The cubic root of 1021451603 is about 1007.1000049590.

Adding to 1021451603 its reverse (3061541201), we get a palindrome (4082992804).

The spelling of 1021451603 in words is "one billion, twenty-one million, four hundred fifty-one thousand, six hundred three".