113115261 has 16 divisors (see below), whose sum is σ = 172540544. Its totient is φ = 64571904.

The previous prime is 113115259. The next prime is 113115271. The reversal of 113115261 is 162511311.

It is a happy number.

It is not a de Polignac number, because 113115261 - 2¹ = 113115259 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113115221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25161 + ... + 29313.

It is an arithmetic number, because the mean of its divisors is an integer number (10783784).

Almost surely, 2^113115261 is an apocalyptic number.

It is an amenable number.

113115261 is a deficient number, since it is larger than the sum of its proper divisors (59425283).

113115261 is a wasteful number, since it uses less digits than its factorization.

113115261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5460.

The product of its digits is 180, while the sum is 21.

The square root of 113115261 is about 10635.5658523654. The cubic root of 113115261 is about 483.6231342765.

Adding to 113115261 its reverse (162511311), we get a palindrome (275626572).

The spelling of 113115261 in words is "one hundred thirteen million, one hundred fifteen thousand, two hundred sixty-one".