105442157 has 4 divisors (see below), whose sum is σ = 105547260. Its totient is φ = 105337056.

The previous prime is 105442151. The next prime is 105442199. The reversal of 105442157 is 751244501.

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 35652841 + 69789316 = 5971^2 + 8354^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105442157 is a prime.

It is a super-4 number, since 4×105442157⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105442151) 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, 51032 + ... + 53057.

It is an arithmetic number, because the mean of its divisors is an integer number (26386815).

Almost surely, 2^105442157 is an apocalyptic number.

It is an amenable number.

105442157 is a deficient number, since it is larger than the sum of its proper divisors (105103).

105442157 is a wasteful number, since it uses less digits than its factorization.

105442157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105102.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 105442157 is about 10268.5031528456. The cubic root of 105442157 is about 472.4306806476.

Adding to 105442157 its reverse (751244501), we get a palindrome (856686658).

The spelling of 105442157 in words is "one hundred five million, four hundred forty-two thousand, one hundred fifty-seven".