2591156 has 6 divisors (see below), whose sum is σ = 4534530. Its totient is φ = 1295576.

The previous prime is 2591153. The next prime is 2591167. The reversal of 2591156 is 6511952.

2591156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1416100 + 1175056 = 1190^2 + 1084^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2591153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323891 + ... + 323898.

It is an arithmetic number, because the mean of its divisors is an integer number (755755).

2^2591156 is an apocalyptic number.

It is an amenable number.

2591156 is a deficient number, since it is larger than the sum of its proper divisors (1943374).

2591156 is a wasteful number, since it uses less digits than its factorization.

2591156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647793 (or 647791 counting only the distinct ones).

The product of its digits is 2700, while the sum is 29.

The square root of 2591156 is about 1609.7068056016. The cubic root of 2591156 is about 137.3507979381.

The spelling of 2591156 in words is "two million, five hundred ninety-one thousand, one hundred fifty-six".