105442521 has 8 divisors (see below), whose sum is σ = 145438080. Its totient is φ = 67870992.

The previous prime is 105442507. The next prime is 105442531. The reversal of 105442521 is 125244501.

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

It is not a de Polignac number, because 105442521 - 2¹⁵ = 105409753 is a prime.

It is a super-2 number, since 2×105442521² = 22236250469670882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 105442491 and 105442500.

It is not an unprimeable number, because it can be changed into a prime (105442531) 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, 605905 + ... + 606078.

It is an arithmetic number, because the mean of its divisors is an integer number (18179760).

Almost surely, 2^105442521 is an apocalyptic number.

It is an amenable number.

105442521 is a deficient number, since it is larger than the sum of its proper divisors (39995559).

105442521 is a wasteful number, since it uses less digits than its factorization.

105442521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212015.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 105442521 is about 10268.5208769326. The cubic root of 105442521 is about 472.4312242776.

The spelling of 105442521 in words is "one hundred five million, four hundred forty-two thousand, five hundred twenty-one".