526139 has 2 divisors, whose sum is σ = 526140. Its totient is φ = 526138.

The previous prime is 526121. The next prime is 526157. The reversal of 526139 is 931625.

It is a balanced prime because it is at equal distance from previous prime (526121) and next prime (526157).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-526139 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (526159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 263069 + 263070.

It is an arithmetic number, because the mean of its divisors is an integer number (263070).

2⁵²⁶¹³⁹ is an apocalyptic number.

526139 is a deficient number, since it is larger than the sum of its proper divisors (1).

526139 is an equidigital number, since it uses as much as digits as its factorization.

526139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 26.

The square root of 526139 is about 725.3543961403. The cubic root of 526139 is about 80.7297296934.

The spelling of 526139 in words is "five hundred twenty-six thousand, one hundred thirty-nine".