115721250 has 40 divisors (see below), whose sum is σ = 289219920. Its totient is φ = 30858000.

The previous prime is 115721231. The next prime is 115721251. The reversal of 115721250 is 52127511.

It is a self number, because there is not a number n which added to its sum of digits gives 115721250.

It is not an unprimeable number, because it can be changed into a prime (115721251) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11680 + ... + 19179.

It is an arithmetic number, because the mean of its divisors is an integer number (7230498).

Almost surely, 2^115721250 is an apocalyptic number.

115721250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115721250 is an abundant number, since it is smaller than the sum of its proper divisors (173498670).

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

115721250 is an equidigital number, since it uses as much as digits as its factorization.

115721250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30884 (or 30869 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 24.

The square root of 115721250 is about 10757.3811868874. The cubic root of 115721250 is about 487.3089323560.

Adding to 115721250 its reverse (52127511), we get a palindrome (167848761).

The spelling of 115721250 in words is "one hundred fifteen million, seven hundred twenty-one thousand, two hundred fifty".