2391057 has 12 divisors (see below), whose sum is σ = 3604224. Its totient is φ = 1524600.

The previous prime is 2391049. The next prime is 2391071. The reversal of 2391057 is 7501932.

It is not a de Polignac number, because 2391057 - 2³ = 2391049 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2391057.

It is not an unprimeable number, because it can be changed into a prime (2391097) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5569 + ... + 5982.

It is an arithmetic number, because the mean of its divisors is an integer number (300352).

2^2391057 is an apocalyptic number.

It is an amenable number.

2391057 is a deficient number, since it is larger than the sum of its proper divisors (1213167).

2391057 is a wasteful number, since it uses less digits than its factorization.

2391057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11580 (or 11577 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 2391057 is about 1546.3043038160. The cubic root of 2391057 is about 133.7200847294.

Adding to 2391057 its reverse (7501932), we get a palindrome (9892989).

It can be divided in two parts, 239 and 1057, that added together give a 4-th power (1296 = 6⁴).

The spelling of 2391057 in words is "two million, three hundred ninety-one thousand, fifty-seven".