2591626 has 4 divisors (see below), whose sum is σ = 3887442. Its totient is φ = 1295812.

The previous prime is 2591623. The next prime is 2591669. The reversal of 2591626 is 6261952.

2591626 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2030625 + 561001 = 1425^2 + 749^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2591623) 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, 647905 + ... + 647908.

2^2591626 is an apocalyptic number.

2591626 is a deficient number, since it is larger than the sum of its proper divisors (1295816).

2591626 is a wasteful number, since it uses less digits than its factorization.

2591626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295815.

The product of its digits is 6480, while the sum is 31.

The square root of 2591626 is about 1609.8527883008. The cubic root of 2591626 is about 137.3591019502.

The spelling of 2591626 in words is "two million, five hundred ninety-one thousand, six hundred twenty-six".