257201003 has 4 divisors (see below), whose sum is σ = 258687888. Its totient is φ = 255714120.

The previous prime is 257200987. The next prime is 257201027. The reversal of 257201003 is 300102752.

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 257201003 - 2⁴ = 257200987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257201093) 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, 743183 + ... + 743528.

It is an arithmetic number, because the mean of its divisors is an integer number (64671972).

Almost surely, 2^257201003 is an apocalyptic number.

257201003 is a deficient number, since it is larger than the sum of its proper divisors (1486885).

257201003 is a wasteful number, since it uses less digits than its factorization.

257201003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486884.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 257201003 is about 16037.4874278984. The cubic root of 257201003 is about 635.9518269421.

Adding to 257201003 its reverse (300102752), we get a palindrome (557303755).

The spelling of 257201003 in words is "two hundred fifty-seven million, two hundred one thousand, three".