113601281 has 4 divisors (see below), whose sum is σ = 113760000. Its totient is φ = 113442564.

The previous prime is 113601269. The next prime is 113601287. The reversal of 113601281 is 182106311.

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, and also an emirpimes, since its reverse is a distinct semiprime: 182106311 = 73 ⋅2494607.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113601281 is a prime.

It is a super-2 number, since 2×113601281² = 25810502089681922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113601287) 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, 78281 + ... + 79718.

It is an arithmetic number, because the mean of its divisors is an integer number (28440000).

Almost surely, 2^113601281 is an apocalyptic number.

It is an amenable number.

113601281 is a deficient number, since it is larger than the sum of its proper divisors (158719).

113601281 is an equidigital number, since it uses as much as digits as its factorization.

113601281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158718.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 113601281 is about 10658.3901692516. The cubic root of 113601281 is about 484.3148024309.

Adding to 113601281 its reverse (182106311), we get a palindrome (295707592).

The spelling of 113601281 in words is "one hundred thirteen million, six hundred one thousand, two hundred eighty-one".