1021453245 has 24 divisors (see below), whose sum is σ = 1874668536. Its totient is φ = 512729088.

The previous prime is 1021453229. The next prime is 1021453249. The reversal of 1021453245 is 5423541201.

It can be written as a sum of positive squares in 4 ways, for example, as 248724441 + 772728804 = 15771^2 + 27798^2 .

It is not a de Polignac number, because 1021453245 - 2⁴ = 1021453229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021453249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 666852 + ... + 668381.

It is an arithmetic number, because the mean of its divisors is an integer number (78111189).

Almost surely, 2^1021453245 is an apocalyptic number.

1021453245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1021453245 is a deficient number, since it is larger than the sum of its proper divisors (853215291).

1021453245 is a wasteful number, since it uses less digits than its factorization.

1021453245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335261 (or 1335258 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1021453245 is about 31960.1821803318. The cubic root of 1021453245 is about 1007.1005446019.

Adding to 1021453245 its reverse (5423541201), we get a palindrome (6444994446).

The spelling of 1021453245 in words is "one billion, twenty-one million, four hundred fifty-three thousand, two hundred forty-five".