111131425 has 6 divisors (see below), whose sum is σ = 137802998. Its totient is φ = 88905120.

The previous prime is 111131369. The next prime is 111131429. The reversal of 111131425 is 524131111.

It can be written as a sum of positive squares in 3 ways, for example, as 4133089 + 106998336 = 2033^2 + 10344^2 .

It is not a de Polignac number, because 111131425 - 2¹¹ = 111129377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111131429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2222604 + ... + 2222653.

Almost surely, 2^111131425 is an apocalyptic number.

It is an amenable number.

111131425 is a deficient number, since it is larger than the sum of its proper divisors (26671573).

111131425 is an equidigital number, since it uses as much as digits as its factorization.

111131425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4445267 (or 4445262 counting only the distinct ones).

The product of its digits is 120, while the sum is 19.

The square root of 111131425 is about 10541.8890622127. The cubic root of 111131425 is about 480.7791526814.

Adding to 111131425 its reverse (524131111), we get a palindrome (635262536).

It can be divided in two parts, 111131 and 425, that added together give a square (111556 = 334²).

The spelling of 111131425 in words is "one hundred eleven million, one hundred thirty-one thousand, four hundred twenty-five".