70106561 has 12 divisors (see below), whose sum is σ = 84563712. Its totient is φ = 56926584.

The previous prime is 70106539. The next prime is 70106639. The reversal of 70106561 is 16560107.

It is a de Polignac number, because none of the positive numbers 2^k-70106561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 70106561.

It is not an unprimeable number, because it can be changed into a prime (70106161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11345 + ... + 16398.

It is an arithmetic number, because the mean of its divisors is an integer number (7046976).

Almost surely, 2^70106561 is an apocalyptic number.

It is an amenable number.

70106561 is a deficient number, since it is larger than the sum of its proper divisors (14457151).

70106561 is a wasteful number, since it uses less digits than its factorization.

70106561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27788 (or 27769 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 70106561 is about 8372.9660813836. The cubic root of 70106561 is about 412.3375517058.

Adding to 70106561 its reverse (16560107), we get a palindrome (86666668).

The spelling of 70106561 in words is "seventy million, one hundred six thousand, five hundred sixty-one".