25427691 has 6 divisors (see below), whose sum is σ = 36728900. Its totient is φ = 16951788.

The previous prime is 25427641. The next prime is 25427711. The reversal of 25427691 is 19672452.

It is not a de Polignac number, because 25427691 - 2¹⁴ = 25411307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25427641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1412641 + ... + 1412658.

Almost surely, 2^25427691 is an apocalyptic number.

25427691 is a deficient number, since it is larger than the sum of its proper divisors (11301209).

25427691 is a wasteful number, since it uses less digits than its factorization.

25427691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825305 (or 2825302 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 25427691 is about 5042.5877285378. The cubic root of 25427691 is about 294.0597893117.

It can be divided in two parts, 25 and 427691, that added together give a square (427716 = 654²).

The spelling of 25427691 in words is "twenty-five million, four hundred twenty-seven thousand, six hundred ninety-one".