70230257 has 4 divisors (see below), whose sum is σ = 72652020. Its totient is φ = 67808496.

The previous prime is 70230239. The next prime is 70230263. The reversal of 70230257 is 75203207.

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 40462321 + 29767936 = 6361^2 + 5456^2 .

It is not a de Polignac number, because 70230257 - 2²⁰ = 69181681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70230217) 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, 1210838 + ... + 1210895.

It is an arithmetic number, because the mean of its divisors is an integer number (18163005).

Almost surely, 2^70230257 is an apocalyptic number.

It is an amenable number.

70230257 is a deficient number, since it is larger than the sum of its proper divisors (2421763).

70230257 is a wasteful number, since it uses less digits than its factorization.

70230257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2421762.

The product of its (nonzero) digits is 2940, while the sum is 26.

The square root of 70230257 is about 8380.3494557208. The cubic root of 70230257 is about 412.5799186446.

The spelling of 70230257 in words is "seventy million, two hundred thirty thousand, two hundred fifty-seven".