1161542020 has 48 divisors (see below), whose sum is σ = 2517016320. Its totient is φ = 450008064.

The previous prime is 1161542003. The next prime is 1161542071. The reversal of 1161542020 is 202451611.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 1161541982 and 1161542000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84811 + ... + 97549.

It is an arithmetic number, because the mean of its divisors is an integer number (52437840).

Almost surely, 2^1161542020 is an apocalyptic number.

1161542020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161542020 is an abundant number, since it is smaller than the sum of its proper divisors (1355474300).

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

1161542020 is a wasteful number, since it uses less digits than its factorization.

1161542020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12892 (or 12890 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1161542020 is about 34081.4028467139. The cubic root of 1161542020 is about 1051.1829509659.

Adding to 1161542020 its reverse (202451611), we get a palindrome (1363993631).

It can be divided in two parts, 11615 and 42020, that added together give a palindrome (53635).

The spelling of 1161542020 in words is "one billion, one hundred sixty-one million, five hundred forty-two thousand, twenty".