25529427 has 72 divisors (see below), whose sum is σ = 49297248. Its totient is φ = 12418560.

The previous prime is 25529381. The next prime is 25529431. The reversal of 25529427 is 72492552.

It is a happy number.

It is not a de Polignac number, because 25529427 - 2⁶ = 25529363 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25529391 and 25529400.

It is not an unprimeable number, because it can be changed into a prime (25529447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 129493 + ... + 129689.

It is an arithmetic number, because the mean of its divisors is an integer number (684684).

Almost surely, 2^25529427 is an apocalyptic number.

25529427 is a deficient number, since it is larger than the sum of its proper divisors (23767821).

25529427 is a wasteful number, since it uses less digits than its factorization.

25529427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 235 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 25529427 is about 5052.6653362359. The cubic root of 25529427 is about 294.4514444389.

The spelling of 25529427 in words is "twenty-five million, five hundred twenty-nine thousand, four hundred twenty-seven".