111987441 has 20 divisors (see below), whose sum is σ = 171375204. Its totient is φ = 72835200.

The previous prime is 111987439. The next prime is 111987479. The reversal of 111987441 is 144789111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3744225 + 108243216 = 1935^2 + 10404^2 .

It is not a de Polignac number, because 111987441 - 2¹ = 111987439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111987396 and 111987405.

It is not an unprimeable number, because it can be changed into a prime (111987401) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13540 + ... + 20181.

Almost surely, 2^111987441 is an apocalyptic number.

It is an amenable number.

111987441 is a deficient number, since it is larger than the sum of its proper divisors (59387763).

111987441 is an equidigital number, since it uses as much as digits as its factorization.

111987441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33774 (or 33765 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 111987441 is about 10582.4118706465. The cubic root of 111987441 is about 482.0104349135.

The spelling of 111987441 in words is "one hundred eleven million, nine hundred eighty-seven thousand, four hundred forty-one".