115400261 has 4 divisors (see below), whose sum is σ = 118084032. Its totient is φ = 112716492.

The previous prime is 115400231. The next prime is 115400279. The reversal of 115400261 is 162004511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115400261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115400231) 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, 1341821 + ... + 1341906.

It is an arithmetic number, because the mean of its divisors is an integer number (29521008).

Almost surely, 2^115400261 is an apocalyptic number.

It is an amenable number.

115400261 is a deficient number, since it is larger than the sum of its proper divisors (2683771).

115400261 is an equidigital number, since it uses as much as digits as its factorization.

115400261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683770.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 115400261 is about 10742.4513496688. The cubic root of 115400261 is about 486.8579473166.

Adding to 115400261 its reverse (162004511), we get a palindrome (277404772).

The spelling of 115400261 in words is "one hundred fifteen million, four hundred thousand, two hundred sixty-one".