115342021 has 4 divisors (see below), whose sum is σ = 116531212. Its totient is φ = 114152832.

The previous prime is 115342013. The next prime is 115342043. The reversal of 115342021 is 120243511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120243511 = 83 ⋅1448717.

It can be written as a sum of positive squares in 2 ways, for example, as 25300900 + 90041121 = 5030^2 + 9489^2 .

It is a cyclic number.

It is not a de Polignac number, because 115342021 - 2³ = 115342013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115342021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115348021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 594450 + ... + 594643.

It is an arithmetic number, because the mean of its divisors is an integer number (29132803).

Almost surely, 2^115342021 is an apocalyptic number.

It is an amenable number.

115342021 is a deficient number, since it is larger than the sum of its proper divisors (1189191).

115342021 is an equidigital number, since it uses as much as digits as its factorization.

115342021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189190.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 115342021 is about 10739.7402668780. The cubic root of 115342021 is about 486.7760313315.

Adding to 115342021 its reverse (120243511), we get a palindrome (235585532).

The spelling of 115342021 in words is "one hundred fifteen million, three hundred forty-two thousand, twenty-one".