260249257 has 4 divisors (see below), whose sum is σ = 260626576. Its totient is φ = 259871940.

The previous prime is 260249237. The next prime is 260249267. The reversal of 260249257 is 752942062.

It is a happy number.

260249257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 260249257 - 2¹¹ = 260247209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (260249237) 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, 187623 + ... + 189004.

It is an arithmetic number, because the mean of its divisors is an integer number (65156644).

Almost surely, 2^260249257 is an apocalyptic number.

It is an amenable number.

260249257 is a deficient number, since it is larger than the sum of its proper divisors (377319).

260249257 is an equidigital number, since it uses as much as digits as its factorization.

260249257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377318.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 260249257 is about 16132.2427765020. The cubic root of 260249257 is about 638.4543242144.

The spelling of 260249257 in words is "two hundred sixty million, two hundred forty-nine thousand, two hundred fifty-seven".