113526421 has 4 divisors (see below), whose sum is σ = 113744844. Its totient is φ = 113308000.

The previous prime is 113526419. The next prime is 113526431. The reversal of 113526421 is 124625311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124625311 = 193 ⋅645727.

It can be written as a sum of positive squares in 2 ways, for example, as 12744900 + 100781521 = 3570^2 + 10039^2 .

It is a cyclic number.

It is not a de Polignac number, because 113526421 - 2¹ = 113526419 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 (113526431) 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, 108430 + ... + 109471.

It is an arithmetic number, because the mean of its divisors is an integer number (28436211).

Almost surely, 2^113526421 is an apocalyptic number.

It is an amenable number.

113526421 is a deficient number, since it is larger than the sum of its proper divisors (218423).

113526421 is an equidigital number, since it uses as much as digits as its factorization.

113526421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218422.

The product of its digits is 1440, while the sum is 25.

The square root of 113526421 is about 10654.8778031473. The cubic root of 113526421 is about 484.2083958466.

It can be divided in two parts, 1135 and 26421, that added together give a square (27556 = 166²).

The spelling of 113526421 in words is "one hundred thirteen million, five hundred twenty-six thousand, four hundred twenty-one".