25145539 has 2 divisors, whose sum is σ = 25145540. Its totient is φ = 25145538.

The previous prime is 25145501. The next prime is 25145543. The reversal of 25145539 is 93554152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25145539 - 2⁹ = 25145027 is a prime.

It is not a weakly prime, because it can be changed into another prime (25145599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12572769 + 12572770.

It is an arithmetic number, because the mean of its divisors is an integer number (12572770).

Almost surely, 2^25145539 is an apocalyptic number.

25145539 is a deficient number, since it is larger than the sum of its proper divisors (1).

25145539 is an equidigital number, since it uses as much as digits as its factorization.

25145539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 34.

The square root of 25145539 is about 5014.5327798310. The cubic root of 25145539 is about 292.9680877854.

The spelling of 25145539 in words is "twenty-five million, one hundred forty-five thousand, five hundred thirty-nine".