1825139 has 2 divisors, whose sum is σ = 1825140. Its totient is φ = 1825138.

The previous prime is 1825129. The next prime is 1825141. The reversal of 1825139 is 9315281.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1825139 - 2²⁰ = 776563 is a prime.

It is a super-2 number, since 2×1825139² = 6662264738642, which contains 22 as substring.

Together with 1825141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1825129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 912569 + 912570.

It is an arithmetic number, because the mean of its divisors is an integer number (912570).

2^1825139 is an apocalyptic number.

1825139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1825139 is an equidigital number, since it uses as much as digits as its factorization.

1825139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 29.

The square root of 1825139 is about 1350.9770538392. The cubic root of 1825139 is about 122.2077219100.

The spelling of 1825139 in words is "one million, eight hundred twenty-five thousand, one hundred thirty-nine".