291057 has 16 divisors (see below), whose sum is σ = 443520. Its totient is φ = 168192.

The previous prime is 291043. The next prime is 291077. The reversal of 291057 is 750192.

It is not a de Polignac number, because 291057 - 2⁴ = 291041 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 291057.

It is not an unprimeable number, because it can be changed into a prime (291007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 444 + ... + 882.

It is an arithmetic number, because the mean of its divisors is an integer number (27720).

2²⁹¹⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

291057 is a deficient number, since it is larger than the sum of its proper divisors (152463).

291057 is a wasteful number, since it uses less digits than its factorization.

291057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472.

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 291057 is about 539.4969879434. The cubic root of 291057 is about 66.2713803072.

The spelling of 291057 in words is "two hundred ninety-one thousand, fifty-seven".