113121025 has 24 divisors (see below), whose sum is σ = 149064120. Its totient is φ = 84994560.

The previous prime is 113120981. The next prime is 113121031. The reversal of 113121025 is 520121311.

It can be written as a sum of positive squares in 12 ways, for example, as 591361 + 112529664 = 769^2 + 10608^2 .

It is not a de Polignac number, because 113121025 - 2¹¹ = 113118977 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24717 + ... + 28933.

It is an arithmetic number, because the mean of its divisors is an integer number (6211005).

Almost surely, 2^113121025 is an apocalyptic number.

It is an amenable number.

113121025 is a deficient number, since it is larger than the sum of its proper divisors (35943095).

113121025 is a wasteful number, since it uses less digits than its factorization.

113121025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4293 (or 4288 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 113121025 is about 10635.8368265031. The cubic root of 113121025 is about 483.6313487778.

Adding to 113121025 its reverse (520121311), we get a palindrome (633242336).

The spelling of 113121025 in words is "one hundred thirteen million, one hundred twenty-one thousand, twenty-five".