257098241 has 4 divisors (see below), whose sum is σ = 258584532. Its totient is φ = 255611952.

The previous prime is 257098217. The next prime is 257098267. The reversal of 257098241 is 142890752.

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 242113600 + 14984641 = 15560^2 + 3871^2 .

It is a cyclic number.

It is not a de Polignac number, because 257098241 - 2¹⁴ = 257081857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257098195 and 257098204.

It is not an unprimeable number, because it can be changed into a prime (257098201) 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, 742886 + ... + 743231.

It is an arithmetic number, because the mean of its divisors is an integer number (64646133).

Almost surely, 2^257098241 is an apocalyptic number.

It is an amenable number.

257098241 is a deficient number, since it is larger than the sum of its proper divisors (1486291).

257098241 is a wasteful number, since it uses less digits than its factorization.

257098241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486290.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 257098241 is about 16034.2833017257. The cubic root of 257098241 is about 635.8671196686.

The spelling of 257098241 in words is "two hundred fifty-seven million, ninety-eight thousand, two hundred forty-one".