248961257 has 4 divisors (see below), whose sum is σ = 249090816. Its totient is φ = 248831700.

The previous prime is 248961253. The next prime is 248961289. The reversal of 248961257 is 752169842.

It is a happy number.

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 248961257 - 2² = 248961253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (248961253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61853 + ... + 65754.

It is an arithmetic number, because the mean of its divisors is an integer number (62272704).

Almost surely, 2^248961257 is an apocalyptic number.

It is an amenable number.

248961257 is a deficient number, since it is larger than the sum of its proper divisors (129559).

248961257 is a wasteful number, since it uses less digits than its factorization.

248961257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129558.

The product of its digits is 241920, while the sum is 44.

The square root of 248961257 is about 15778.5061713712. The cubic root of 248961257 is about 629.0868243132.

The spelling of 248961257 in words is "two hundred forty-eight million, nine hundred sixty-one thousand, two hundred fifty-seven".