1173021020 has 12 divisors (see below), whose sum is σ = 2463344184. Its totient is φ = 469208400.

The previous prime is 1173021019. The next prime is 1173021071. The reversal of 1173021020 is 201203711.

It is a self number, because there is not a number n which added to its sum of digits gives 1173021020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29325506 + ... + 29325545.

It is an arithmetic number, because the mean of its divisors is an integer number (205278682).

Almost surely, 2^1173021020 is an apocalyptic number.

1173021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1173021020 is an abundant number, since it is smaller than the sum of its proper divisors (1290323164).

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

1173021020 is a wasteful number, since it uses less digits than its factorization.

1173021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58651060 (or 58651058 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 1173021020 is about 34249.3944472015. The cubic root of 1173021020 is about 1054.6343963511.

Adding to 1173021020 its reverse (201203711), we get a palindrome (1374224731).

The spelling of 1173021020 in words is "one billion, one hundred seventy-three million, twenty-one thousand, twenty".