25491229 has 8 divisors (see below), whose sum is σ = 25991640. Its totient is φ = 24993600.

The previous prime is 25491227. The next prime is 25491233. The reversal of 25491229 is 92219452.

It can be written as a sum of positive squares in 4 ways, for example, as 511225 + 24980004 = 715^2 + 4998^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 25491229 - 2¹ = 25491227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25491194 and 25491203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25491227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30639 + ... + 31459.

It is an arithmetic number, because the mean of its divisors is an integer number (3248955).

Almost surely, 2^25491229 is an apocalyptic number.

It is an amenable number.

25491229 is a deficient number, since it is larger than the sum of its proper divisors (500411).

25491229 is an equidigital number, since it uses as much as digits as its factorization.

25491229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391.

The product of its digits is 12960, while the sum is 34.

The square root of 25491229 is about 5048.8839360793. The cubic root of 25491229 is about 294.3045150340.

The spelling of 25491229 in words is "twenty-five million, four hundred ninety-one thousand, two hundred twenty-nine".