1161012620 has 96 divisors (see below), whose sum is σ = 2711439360. Its totient is φ = 415595520.

The previous prime is 1161012617. The next prime is 1161012673. The reversal of 1161012620 is 262101611.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1161012592 and 1161012601.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 620927 + ... + 622793.

It is an arithmetic number, because the mean of its divisors is an integer number (28244160).

Almost surely, 2^1161012620 is an apocalyptic number.

1161012620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161012620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1355719680).

1161012620 is an abundant number, since it is smaller than the sum of its proper divisors (1550426740).

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

1161012620 is a wasteful number, since it uses less digits than its factorization.

1161012620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983 (or 1981 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1161012620 is about 34073.6352624724. The cubic root of 1161012620 is about 1051.0232262748.

The spelling of 1161012620 in words is "one billion, one hundred sixty-one million, twelve thousand, six hundred twenty".