291248 has 20 divisors (see below), whose sum is σ = 572880. Its totient is φ = 143424.

The previous prime is 291217. The next prime is 291253. The reversal of 291248 is 842192.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

291248 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 in 3 ways as a sum of consecutive naturals, for example, 1661 + ... + 1827.

It is an arithmetic number, because the mean of its divisors is an integer number (28644).

2²⁹¹²⁴⁸ is an apocalyptic number.

It is an amenable number.

291248 is a deficient number, since it is larger than the sum of its proper divisors (281632).

291248 is a wasteful number, since it uses less digits than its factorization.

291248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 278 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 291248 is about 539.6739756557. The cubic root of 291248 is about 66.2858735345.

The spelling of 291248 in words is "two hundred ninety-one thousand, two hundred forty-eight".