115343021 has 4 divisors (see below), whose sum is σ = 116639100. Its totient is φ = 114046944.

The previous prime is 115343017. The next prime is 115343047. The reversal of 115343021 is 120343511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21058921 + 94284100 = 4589^2 + 9710^2 .

It is a cyclic number.

It is not a de Polignac number, because 115343021 - 2² = 115343017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115342984 and 115343002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115343821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 647906 + ... + 648083.

It is an arithmetic number, because the mean of its divisors is an integer number (29159775).

Almost surely, 2^115343021 is an apocalyptic number.

It is an amenable number.

115343021 is a deficient number, since it is larger than the sum of its proper divisors (1296079).

115343021 is an equidigital number, since it uses as much as digits as its factorization.

115343021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296078.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 115343021 is about 10739.7868228378. The cubic root of 115343021 is about 486.7774380886. Note that the first 3 decimals are identical.

Adding to 115343021 its reverse (120343511), we get a palindrome (235686532).

The spelling of 115343021 in words is "one hundred fifteen million, three hundred forty-three thousand, twenty-one".