25039429 has 2 divisors, whose sum is σ = 25039430. Its totient is φ = 25039428.

The previous prime is 25039411. The next prime is 25039439. The reversal of 25039429 is 92493052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13322500 + 11716929 = 3650^2 + 3423^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25039429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25039394 and 25039403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25039439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12519714 + 12519715.

It is an arithmetic number, because the mean of its divisors is an integer number (12519715).

Almost surely, 2^25039429 is an apocalyptic number.

It is an amenable number.

25039429 is a deficient number, since it is larger than the sum of its proper divisors (1).

25039429 is an equidigital number, since it uses as much as digits as its factorization.

25039429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 25039429 is about 5003.9413465787. The cubic root of 25039429 is about 292.5554145381. Note that the first 3 decimals are identical.

The spelling of 25039429 in words is "twenty-five million, thirty-nine thousand, four hundred twenty-nine".