Search a number
257248 = 258039
BaseRepresentation
bin111110110011100000
3111001212201
4332303200
531212443
65302544
72120665
oct766340
9431781
10257248
11166302
12104a54
1390124
1469a6c
155134d
hex3ece0

257248 has 12 divisors (see below), whose sum is σ = 506520. Its totient is φ = 128608.

The previous prime is 257239. The next prime is 257249. The reversal of 257248 is 842752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257249) by changing a digit.

257248 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3988 + ... + 4051.

It is an arithmetic number, because the mean of its divisors is an integer number (42210).

2257248 is an apocalyptic number.

It is an amenable number.

257248 is a deficient number, since it is larger than the sum of its proper divisors (249272).

257248 is an equidigital number, since it uses as much as digits as its factorization.

257248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8049 (or 8041 counting only the distinct ones).

The product of its digits is 4480, while the sum is 28.

The square root of 257248 is about 507.1962144969. The cubic root of 257248 is about 63.5990559305.

It can be divided in two parts, 257 and 248, that multiplied together give a palindrome (63736).

The spelling of 257248 in words is "two hundred fifty-seven thousand, two hundred forty-eight".