105542121 has 8 divisors (see below), whose sum is σ = 140890464. Its totient is φ = 70277600.

The previous prime is 105542117. The next prime is 105542149. The reversal of 105542121 is 121245501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 105542121 - 2² = 105542117 is a prime.

It is a super-2 number, since 2×105542121² = 22278278610357282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105542191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17955 + ... + 23096.

It is an arithmetic number, because the mean of its divisors is an integer number (17611308).

Almost surely, 2^105542121 is an apocalyptic number.

It is an amenable number.

105542121 is a deficient number, since it is larger than the sum of its proper divisors (35348343).

105542121 is an equidigital number, since it uses as much as digits as its factorization.

105542121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41911.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 105542121 is about 10273.3695056685. The cubic root of 105542121 is about 472.5799288092.

Adding to 105542121 its reverse (121245501), we get a palindrome (226787622).

The spelling of 105542121 in words is "one hundred five million, five hundred forty-two thousand, one hundred twenty-one".