70315121 has 2 divisors, whose sum is σ = 70315122. Its totient is φ = 70315120.

The previous prime is 70315109. The next prime is 70315177. The reversal of 70315121 is 12151307.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37699600 + 32615521 = 6140^2 + 5711^2 .

It is a cyclic number.

It is not a de Polignac number, because 70315121 - 2¹⁴ = 70298737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70315093 and 70315102.

It is not a weakly prime, because it can be changed into another prime (70365121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35157560 + 35157561.

It is an arithmetic number, because the mean of its divisors is an integer number (35157561).

Almost surely, 2^70315121 is an apocalyptic number.

It is an amenable number.

70315121 is a deficient number, since it is larger than the sum of its proper divisors (1).

70315121 is an equidigital number, since it uses as much as digits as its factorization.

70315121 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 70315121 is about 8385.4112004123. The cubic root of 70315121 is about 412.7460345526.

Adding to 70315121 its reverse (12151307), we get a palindrome (82466428).

The spelling of 70315121 in words is "seventy million, three hundred fifteen thousand, one hundred twenty-one".