115821252 has 30 divisors (see below), whose sum is σ = 302780478. Its totient is φ = 38606976.

The previous prime is 115821247. The next prime is 115821257. The reversal of 115821252 is 252128511.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (115821247) and next prime (115821257).

It can be written as a sum of positive squares in only one way, i.e., 72182016 + 43639236 = 8496^2 + 6606^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (115821257) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 178413 + ... + 179060.

Almost surely, 2^115821252 is an apocalyptic number.

115821252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

115821252 is an abundant number, since it is smaller than the sum of its proper divisors (186959226).

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

115821252 is a wasteful number, since it uses less digits than its factorization.

115821252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357489 (or 357478 counting only the distinct ones).

The product of its digits is 1600, while the sum is 27.

The square root of 115821252 is about 10762.0282475006. The cubic root of 115821252 is about 487.4492633588.

Adding to 115821252 its reverse (252128511), we get a palindrome (367949763).

The spelling of 115821252 in words is "one hundred fifteen million, eight hundred twenty-one thousand, two hundred fifty-two".