25720134 has 16 divisors (see below), whose sum is σ = 56116800. Its totient is φ = 7793960.

The previous prime is 25720127. The next prime is 25720157. The reversal of 25720134 is 43102752.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 194784 + ... + 194915.

It is an arithmetic number, because the mean of its divisors is an integer number (3507300).

Almost surely, 2^25720134 is an apocalyptic number.

25720134 is an abundant number, since it is smaller than the sum of its proper divisors (30396666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25720134 is a wasteful number, since it uses less digits than its factorization.

25720134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389715.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 25720134 is about 5071.5021443355. The cubic root of 25720134 is about 295.1828187869.

Adding to 25720134 its reverse (43102752), we get a palindrome (68822886).

The spelling of 25720134 in words is "twenty-five million, seven hundred twenty thousand, one hundred thirty-four".