70286257 has 4 divisors (see below), whose sum is σ = 70540276. Its totient is φ = 70032240.

The previous prime is 70286243. The next prime is 70286261. The reversal of 70286257 is 75268207.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14470416 + 55815841 = 3804^2 + 7471^2 .

It is a cyclic number.

It is not a de Polignac number, because 70286257 - 2⁷ = 70286129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70287257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126594 + ... + 127147.

It is an arithmetic number, because the mean of its divisors is an integer number (17635069).

Almost surely, 2^70286257 is an apocalyptic number.

It is an amenable number.

70286257 is a deficient number, since it is larger than the sum of its proper divisors (254019).

70286257 is a wasteful number, since it uses less digits than its factorization.

70286257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254018.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 70286257 is about 8383.6899394002. The cubic root of 70286257 is about 412.6895501062.

The spelling of 70286257 in words is "seventy million, two hundred eighty-six thousand, two hundred fifty-seven".