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290257 = 1126387
BaseRepresentation
bin1000110110111010001
3112202011021
41012313101
533242012
610115441
72316142
oct1066721
9482137
10290257
11189090
1211bb81
13a2166
1477ac9
155b007
hex46dd1

290257 has 4 divisors (see below), whose sum is σ = 316656. Its totient is φ = 263860.

The previous prime is 290249. The next prime is 290317. The reversal of 290257 is 752092.

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 290257 - 23 = 290249 is a prime.

It is a Duffinian number.

290257 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (290057) 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, 13183 + ... + 13204.

It is an arithmetic number, because the mean of its divisors is an integer number (79164).

2290257 is an apocalyptic number.

It is an amenable number.

290257 is a deficient number, since it is larger than the sum of its proper divisors (26399).

290257 is a wasteful number, since it uses less digits than its factorization.

290257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26398.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 290257 is about 538.7550463801. The cubic root of 290257 is about 66.2106066982.

The spelling of 290257 in words is "two hundred ninety thousand, two hundred fifty-seven".

Divisors: 1 11 26387 290257