70425281 has 2 divisors, whose sum is σ = 70425282. Its totient is φ = 70425280.

The previous prime is 70425263. The next prime is 70425283. The reversal of 70425281 is 18252407.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66259600 + 4165681 = 8140^2 + 2041^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70425281 is a prime.

It is a super-2 number, since 2×70425281² = 9919440407857922, which contains 22 as substring.

Together with 70425283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70425283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35212640 + 35212641.

It is an arithmetic number, because the mean of its divisors is an integer number (35212641).

Almost surely, 2^70425281 is an apocalyptic number.

It is an amenable number.

70425281 is a deficient number, since it is larger than the sum of its proper divisors (1).

70425281 is an equidigital number, since it uses as much as digits as its factorization.

70425281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 70425281 is about 8391.9771806172. The cubic root of 70425281 is about 412.9614665431.

Adding to 70425281 its reverse (18252407), we get a palindrome (88677688).

The spelling of 70425281 in words is "seventy million, four hundred twenty-five thousand, two hundred eighty-one".