113251 has 4 divisors (see below), whose sum is σ = 114400. Its totient is φ = 112104.

The previous prime is 113233. The next prime is 113279. The reversal of 113251 is 152311.

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

It is a cyclic number.

It is not a de Polignac number, because 113251 - 2⁷ = 113123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113051) 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, 411 + ... + 628.

It is an arithmetic number, because the mean of its divisors is an integer number (28600).

2¹¹³²⁵¹ is an apocalyptic number.

113251 is the 151-st centered decagonal number.

113251 is a deficient number, since it is larger than the sum of its proper divisors (1149).

113251 is a wasteful number, since it uses less digits than its factorization.

113251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148.

The product of its digits is 30, while the sum is 13.

The square root of 113251 is about 336.5278591736. The cubic root of 113251 is about 48.3816507180.

Adding to 113251 its reverse (152311), we get a palindrome (265562).

Subtracting 113251 from its reverse (152311), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 113251 in words is "one hundred thirteen thousand, two hundred fifty-one".