111925421 has 4 divisors (see below), whose sum is σ = 113183100. Its totient is φ = 110667744.

The previous prime is 111925403. The next prime is 111925477. The reversal of 111925421 is 124529111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 57002500 + 54922921 = 7550^2 + 7411^2 .

It is a cyclic number.

It is not a de Polignac number, because 111925421 - 2¹⁴ = 111909037 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 (111925321) 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, 628706 + ... + 628883.

It is an arithmetic number, because the mean of its divisors is an integer number (28295775).

Almost surely, 2^111925421 is an apocalyptic number.

It is an amenable number.

111925421 is a deficient number, since it is larger than the sum of its proper divisors (1257679).

111925421 is an equidigital number, since it uses as much as digits as its factorization.

111925421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257678.

The product of its digits is 720, while the sum is 26.

The square root of 111925421 is about 10579.4811309440. The cubic root of 111925421 is about 481.9214374116.

The spelling of 111925421 in words is "one hundred eleven million, nine hundred twenty-five thousand, four hundred twenty-one".