111542401 has 4 divisors (see below), whose sum is σ = 111564612. Its totient is φ = 111520192.

The previous prime is 111542393. The next prime is 111542429. The reversal of 111542401 is 104245111.

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 47941776 + 63600625 = 6924^2 + 7975^2 .

It is a cyclic number.

It is not a de Polignac number, because 111542401 - 2³ = 111542393 is a prime.

It is a super-3 number, since 3×111542401³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111542441) 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, 405 + ... + 14941.

It is an arithmetic number, because the mean of its divisors is an integer number (27891153).

Almost surely, 2^111542401 is an apocalyptic number.

It is an amenable number.

111542401 is a deficient number, since it is larger than the sum of its proper divisors (22211).

111542401 is an equidigital number, since it uses as much as digits as its factorization.

111542401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22210.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 111542401 is about 10561.3635956727. The cubic root of 111542401 is about 481.3710813344.

Adding to 111542401 its reverse (104245111), we get a palindrome (215787512).

The spelling of 111542401 in words is "one hundred eleven million, five hundred forty-two thousand, four hundred one".