1020197520 has 60 divisors (see below), whose sum is σ = 3426165756. Its totient is φ = 272052480.

The previous prime is 1020197501. The next prime is 1020197531. The reversal of 1020197520 is 257910201.

It can be written as a sum of positive squares in 2 ways, for example, as 795916944 + 224280576 = 28212^2 + 14976^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 707751 + ... + 709190.

Almost surely, 2^1020197520 is an apocalyptic number.

1020197520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020197520 is an abundant number, since it is smaller than the sum of its proper divisors (2405968236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020197520 is a wasteful number, since it uses less digits than its factorization.

1020197520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416960 (or 1416951 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 1020197520 is about 31940.5309912030. The cubic root of 1020197520 is about 1006.6876818754.

The spelling of 1020197520 in words is "one billion, twenty million, one hundred ninety-seven thousand, five hundred twenty".