105273721 has 8 divisors (see below), whose sum is σ = 120405824. Its totient is φ = 90164880.

The previous prime is 105273709. The next prime is 105273757. The reversal of 105273721 is 127372501.

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 105273721 - 2⁵ = 105273689 is a prime.

It is a super-2 number, since 2×105273721² = 22165112666371682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 105273721.

It is not an unprimeable number, because it can be changed into a prime (105273121) 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, 5311 + ... + 15451.

It is an arithmetic number, because the mean of its divisors is an integer number (15050728).

Almost surely, 2^105273721 is an apocalyptic number.

It is an amenable number.

105273721 is a deficient number, since it is larger than the sum of its proper divisors (15132103).

105273721 is a wasteful number, since it uses less digits than its factorization.

105273721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11631.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 105273721 is about 10260.2982900109. The cubic root of 105273721 is about 472.1789889606.

The spelling of 105273721 in words is "one hundred five million, two hundred seventy-three thousand, seven hundred twenty-one".