115641278 has 4 divisors (see below), whose sum is σ = 173461920. Its totient is φ = 57820638.

The previous prime is 115641269. The next prime is 115641287. The reversal of 115641278 is 872146511.

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

It is an interprime number because it is at equal distance from previous prime (115641269) and next prime (115641287).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28910318 + ... + 28910321.

It is an arithmetic number, because the mean of its divisors is an integer number (43365480).

Almost surely, 2^115641278 is an apocalyptic number.

115641278 is a deficient number, since it is larger than the sum of its proper divisors (57820642).

115641278 is an equidigital number, since it uses as much as digits as its factorization.

115641278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57820641.

The product of its digits is 13440, while the sum is 35.

The square root of 115641278 is about 10753.6634687905. The cubic root of 115641278 is about 487.1966509018.

Adding to 115641278 its reverse (872146511), we get a palindrome (987787789).

The spelling of 115641278 in words is "one hundred fifteen million, six hundred forty-one thousand, two hundred seventy-eight".