105070921 has 2 divisors, whose sum is σ = 105070922. Its totient is φ = 105070920.

The previous prime is 105070913. The next prime is 105070949. The reversal of 105070921 is 129070501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104448400 + 622521 = 10220^2 + 789^2 .

It is a cyclic number.

It is not a de Polignac number, because 105070921 - 2³ = 105070913 is a prime.

It is a super-2 number, since 2×105070921² = 22079796879576482, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (105070981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52535460 + 52535461.

It is an arithmetic number, because the mean of its divisors is an integer number (52535461).

Almost surely, 2^105070921 is an apocalyptic number.

It is an amenable number.

105070921 is a deficient number, since it is larger than the sum of its proper divisors (1).

105070921 is an equidigital number, since it uses as much as digits as its factorization.

105070921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 105070921 is about 10250.4107722569. The cubic root of 105070921 is about 471.8755911342.

The spelling of 105070921 in words is "one hundred five million, seventy thousand, nine hundred twenty-one".