105048721 has 2 divisors, whose sum is σ = 105048722. Its totient is φ = 105048720.

The previous prime is 105048707. The next prime is 105048731. The reversal of 105048721 is 127840501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104837121 + 211600 = 10239^2 + 460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105048721 is a prime.

It is a super-2 number, since 2×105048721² = 22070467567471682, which contains 22 as substring.

It is equal to p_6035338 and since 105048721 and 6035338 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 105048721.

It is not a weakly prime, because it can be changed into another prime (105048731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52524360 + 52524361.

It is an arithmetic number, because the mean of its divisors is an integer number (52524361).

Almost surely, 2^105048721 is an apocalyptic number.

It is an amenable number.

105048721 is a deficient number, since it is larger than the sum of its proper divisors (1).

105048721 is an equidigital number, since it uses as much as digits as its factorization.

105048721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 105048721 is about 10249.3278316190. The cubic root of 105048721 is about 471.8423552464.

The spelling of 105048721 in words is "one hundred five million, forty-eight thousand, seven hundred twenty-one".