1156615122 has 48 divisors (see below), whose sum is σ = 2604284928. Its totient is φ = 340396320.

The previous prime is 1156615087. The next prime is 1156615133. The reversal of 1156615122 is 2215166511.

It is a self number, because there is not a number n which added to its sum of digits gives 1156615122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27247 + ... + 55277.

It is an arithmetic number, because the mean of its divisors is an integer number (54255936).

Almost surely, 2^1156615122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1156615122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1302142464).

1156615122 is an abundant number, since it is smaller than the sum of its proper divisors (1447669806).

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

1156615122 is a wasteful number, since it uses less digits than its factorization.

1156615122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28095 (or 28072 counting only the distinct ones).

The product of its digits is 3600, while the sum is 30.

The square root of 1156615122 is about 34009.0447087242. The cubic root of 1156615122 is about 1049.6945814648.

The spelling of 1156615122 in words is "one billion, one hundred fifty-six million, six hundred fifteen thousand, one hundred twenty-two".