111521425 has 12 divisors (see below), whose sum is σ = 139300236. Its totient is φ = 88563200.

The previous prime is 111521419. The next prime is 111521437. The reversal of 111521425 is 524125111.

It can be written as a sum of positive squares in 6 ways, for example, as 261121 + 111260304 = 511^2 + 10548^2 .

It is not a de Polignac number, because 111521425 - 2¹⁹ = 110997137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111521396 and 111521405.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12856 + ... + 19705.

It is an arithmetic number, because the mean of its divisors is an integer number (11608353).

Almost surely, 2^111521425 is an apocalyptic number.

It is an amenable number.

111521425 is a deficient number, since it is larger than the sum of its proper divisors (27778811).

111521425 is a wasteful number, since it uses less digits than its factorization.

111521425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32708 (or 32703 counting only the distinct ones).

The product of its digits is 400, while the sum is 22.

The square root of 111521425 is about 10560.3704953946. The cubic root of 111521425 is about 481.3409048493.

Adding to 111521425 its reverse (524125111), we get a palindrome (635646536).

The spelling of 111521425 in words is "one hundred eleven million, five hundred twenty-one thousand, four hundred twenty-five".