1201132500 has 120 divisors (see below), whose sum is σ = 3686944800. Its totient is φ = 303408000.

The previous prime is 1201132487. The next prime is 1201132523. The reversal of 1201132500 is 52311021.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1201132500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 138286 + ... + 146714.

It is an arithmetic number, because the mean of its divisors is an integer number (30724540).

Almost surely, 2^1201132500 is an apocalyptic number.

1201132500 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 1201132500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1843472400).

1201132500 is an abundant number, since it is smaller than the sum of its proper divisors (2485812300).

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

1201132500 is a wasteful number, since it uses less digits than its factorization.

1201132500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8475 (or 8458 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 1201132500 is about 34657.3585260043. The cubic root of 1201132500 is about 1062.9927587491.

Adding to 1201132500 its reverse (52311021), we get a palindrome (1253443521).

The spelling of 1201132500 in words is "one billion, two hundred one million, one hundred thirty-two thousand, five hundred".