111798541 has 2 divisors, whose sum is σ = 111798542. Its totient is φ = 111798540.

The previous prime is 111798539. The next prime is 111798553. The reversal of 111798541 is 145897111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84456100 + 27342441 = 9190^2 + 5229^2 .

It is a cyclic number.

It is not a de Polignac number, because 111798541 - 2¹ = 111798539 is a prime.

Together with 111798539, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 111798541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111798521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55899270 + 55899271.

It is an arithmetic number, because the mean of its divisors is an integer number (55899271).

Almost surely, 2^111798541 is an apocalyptic number.

It is an amenable number.

111798541 is a deficient number, since it is larger than the sum of its proper divisors (1).

111798541 is an equidigital number, since it uses as much as digits as its factorization.

111798541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 37.

The square root of 111798541 is about 10573.4829171849. The cubic root of 111798541 is about 481.7392645822.

The spelling of 111798541 in words is "one hundred eleven million, seven hundred ninety-eight thousand, five hundred forty-one".