25721134 has 8 divisors (see below), whose sum is σ = 39826368. Its totient is φ = 12445680.

The previous prime is 25721071. The next prime is 25721147. The reversal of 25721134 is 43112752.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 25721099 and 25721108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207367 + ... + 207490.

It is an arithmetic number, because the mean of its divisors is an integer number (4978296).

Almost surely, 2^25721134 is an apocalyptic number.

25721134 is a deficient number, since it is larger than the sum of its proper divisors (14105234).

25721134 is a wasteful number, since it uses less digits than its factorization.

25721134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414890.

The product of its digits is 1680, while the sum is 25.

The square root of 25721134 is about 5071.6007334963. The cubic root of 25721134 is about 295.1866443112.

Adding to 25721134 its reverse (43112752), we get a palindrome (68833886).

The spelling of 25721134 in words is "twenty-five million, seven hundred twenty-one thousand, one hundred thirty-four".