1161020 has 24 divisors (see below), whose sum is σ = 2786784. Its totient is φ = 398016.

The previous prime is 1161011. The next prime is 1161031. The reversal of 1161020 is 201611.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1160992 and 1161010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4007 + ... + 4286.

It is an arithmetic number, because the mean of its divisors is an integer number (116116).

2^1161020 is an apocalyptic number.

1161020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161020 is an abundant number, since it is smaller than the sum of its proper divisors (1625764).

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

1161020 is a wasteful number, since it uses less digits than its factorization.

1161020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8309 (or 8307 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1161020 is about 1077.5063804915. The cubic root of 1161020 is about 105.1025453220.

Adding to 1161020 its reverse (201611), we get a palindrome (1362631).

The spelling of 1161020 in words is "one million, one hundred sixty-one thousand, twenty".