105067721 has 8 divisors (see below), whose sum is σ = 114717600. Its totient is φ = 95434240.

The previous prime is 105067693. The next prime is 105067723. The reversal of 105067721 is 127760501.

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

It is a de Polignac number, because none of the positive numbers 2^k-105067721 is a prime.

It is a super-2 number, since 2×105067721² = 22078451992267682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105067723) 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, 12110 + ... + 18888.

It is an arithmetic number, because the mean of its divisors is an integer number (14339700).

Almost surely, 2^105067721 is an apocalyptic number.

105067721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

105067721 is a deficient number, since it is larger than the sum of its proper divisors (9649879).

105067721 is a wasteful number, since it uses less digits than its factorization.

105067721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8199.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 105067721 is about 10250.2546797628. The cubic root of 105067721 is about 471.8708006644.

The spelling of 105067721 in words is "one hundred five million, sixty-seven thousand, seven hundred twenty-one".