257146843 has 4 divisors (see below), whose sum is σ = 259109928. Its totient is φ = 255183760.

The previous prime is 257146819. The next prime is 257146849. The reversal of 257146843 is 348641752.

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

It is a cyclic number.

It is not a de Polignac number, because 257146843 - 2¹⁷ = 257015771 is a prime.

It is a super-2 number, since 2×257146843² = 132248997729733298, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257146796 and 257146805.

It is not an unprimeable number, because it can be changed into a prime (257146849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 981346 + ... + 981607.

It is an arithmetic number, because the mean of its divisors is an integer number (64777482).

Almost surely, 2^257146843 is an apocalyptic number.

257146843 is a deficient number, since it is larger than the sum of its proper divisors (1963085).

257146843 is a wasteful number, since it uses less digits than its factorization.

257146843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963084.

The product of its digits is 161280, while the sum is 40.

The square root of 257146843 is about 16035.7987951957. The cubic root of 257146843 is about 635.9071853733.

The spelling of 257146843 in words is "two hundred fifty-seven million, one hundred forty-six thousand, eight hundred forty-three".