70115321 has 2 divisors, whose sum is σ = 70115322. Its totient is φ = 70115320.

The previous prime is 70115267. The next prime is 70115323. The reversal of 70115321 is 12351107.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58690921 + 11424400 = 7661^2 + 3380^2 .

It is a cyclic number.

It is not a de Polignac number, because 70115321 - 2¹⁴ = 70098937 is a prime.

Together with 70115323, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_4124432 and since 70115321 and 4124432 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 70115293 and 70115302.

It is not a weakly prime, because it can be changed into another prime (70115323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35057660 + 35057661.

It is an arithmetic number, because the mean of its divisors is an integer number (35057661).

Almost surely, 2^70115321 is an apocalyptic number.

It is an amenable number.

70115321 is a deficient number, since it is larger than the sum of its proper divisors (1).

70115321 is an equidigital number, since it uses as much as digits as its factorization.

70115321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 70115321 is about 8373.4891771591. The cubic root of 70115321 is about 412.3547252127.

Adding to 70115321 its reverse (12351107), we get a palindrome (82466428).

The spelling of 70115321 in words is "seventy million, one hundred fifteen thousand, three hundred twenty-one".