2506859 has 2 divisors, whose sum is σ = 2506860. Its totient is φ = 2506858.

The previous prime is 2506843. The next prime is 2506873. The reversal of 2506859 is 9586052.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2506859 - 2⁴ = 2506843 is a prime.

It is a super-3 number, since 3×2506859³ = 47261878250385593337, which contains 333 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2506459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1253429 + 1253430.

It is an arithmetic number, because the mean of its divisors is an integer number (1253430).

2^2506859 is an apocalyptic number.

2506859 is a deficient number, since it is larger than the sum of its proper divisors (1).

2506859 is an equidigital number, since it uses as much as digits as its factorization.

2506859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 2506859 is about 1583.3063506473. The cubic root of 2506859 is about 135.8448887590.

The spelling of 2506859 in words is "two million, five hundred six thousand, eight hundred fifty-nine".