1161401500 has 96 divisors (see below), whose sum is σ = 2917684224. Its totient is φ = 395611200.

The previous prime is 1161401497. The next prime is 1161401513. The reversal of 1161401500 is 51041611.

It is a congruent number.

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, 583507 + ... + 585493.

It is an arithmetic number, because the mean of its divisors is an integer number (30392544).

Almost surely, 2^1161401500 is an apocalyptic number.

1161401500 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 1161401500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1458842112).

1161401500 is an abundant number, since it is smaller than the sum of its proper divisors (1756282724).

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

1161401500 is a wasteful number, since it uses less digits than its factorization.

1161401500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180 (or 2168 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1161401500 is about 34079.3412495019. The cubic root of 1161401500 is about 1051.1405595636.

The spelling of 1161401500 in words is "one billion, one hundred sixty-one million, four hundred one thousand, five hundred".