2258639 has 2 divisors, whose sum is σ = 2258640. Its totient is φ = 2258638.

The previous prime is 2258621. The next prime is 2258651. The reversal of 2258639 is 9368522.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2258639 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2258599 and 2258608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2258339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1129319 + 1129320.

It is an arithmetic number, because the mean of its divisors is an integer number (1129320).

2^2258639 is an apocalyptic number.

2258639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2258639 is an equidigital number, since it uses as much as digits as its factorization.

2258639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 2258639 is about 1502.8769078005. The cubic root of 2258639 is about 131.2045635620.

The spelling of 2258639 in words is "two million, two hundred fifty-eight thousand, six hundred thirty-nine".