1020531345 has 16 divisors (see below), whose sum is σ = 1633305600. Its totient is φ = 544131584.

The previous prime is 1020531307. The next prime is 1020531353. The reversal of 1020531345 is 5431350201.

It is a cyclic number.

It is not a de Polignac number, because 1020531345 - 2⁷ = 1020531217 is a prime.

It is a super-2 number, since 2×1020531345² = 2082968452255018050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64897 + ... + 79073.

It is an arithmetic number, because the mean of its divisors is an integer number (102081600).

Almost surely, 2^1020531345 is an apocalyptic number.

1020531345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020531345 is a deficient number, since it is larger than the sum of its proper divisors (612774255).

1020531345 is a wasteful number, since it uses less digits than its factorization.

1020531345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18984.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1020531345 is about 31945.7562909379. The cubic root of 1020531345 is about 1006.7974713560.

Adding to 1020531345 its reverse (5431350201), we get a palindrome (6451881546).

The spelling of 1020531345 in words is "one billion, twenty million, five hundred thirty-one thousand, three hundred forty-five".