1170205020 has 72 divisors (see below), whose sum is σ = 3616625376. Its totient is φ = 306164352.

The previous prime is 1170205007. The next prime is 1170205021. The reversal of 1170205020 is 205020711.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1170204984 and 1170205002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1170205021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51792 + ... + 70871.

It is an arithmetic number, because the mean of its divisors is an integer number (50230908).

Almost surely, 2^1170205020 is an apocalyptic number.

1170205020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1170205020 is an abundant number, since it is smaller than the sum of its proper divisors (2446420356).

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

1170205020 is a wasteful number, since it uses less digits than its factorization.

1170205020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122731 (or 122726 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 1170205020 is about 34208.2595289500. The cubic root of 1170205020 is about 1053.7897879718.

Adding to 1170205020 its reverse (205020711), we get a palindrome (1375225731).

The spelling of 1170205020 in words is "one billion, one hundred seventy million, two hundred five thousand, twenty".