25718429 has 12 divisors (see below), whose sum is σ = 28932288. Its totient is φ = 22832040.

The previous prime is 25718423. The next prime is 25718431. The reversal of 25718429 is 92481752.

It is a de Polignac number, because none of the positive numbers 2^k-25718429 is a prime.

It is a super-2 number, since 2×25718429² = 1322875180456082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25718392 and 25718401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25718423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2732 + ... + 7674.

It is an arithmetic number, because the mean of its divisors is an integer number (2411024).

Almost surely, 2^25718429 is an apocalyptic number.

It is an amenable number.

25718429 is a deficient number, since it is larger than the sum of its proper divisors (3213859).

25718429 is a wasteful number, since it uses less digits than its factorization.

25718429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5008 (or 4997 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 25718429 is about 5071.3340453967. The cubic root of 25718429 is about 295.1762960393.

The spelling of 25718429 in words is "twenty-five million, seven hundred eighteen thousand, four hundred twenty-nine".