25280641 has 8 divisors (see below), whose sum is σ = 26286624. Its totient is φ = 24293280.

The previous prime is 25280639. The next prime is 25280653. The reversal of 25280641 is 14608252.

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 25280641 - 2¹ = 25280639 is a prime.

It is a super-2 number, since 2×25280641² = 1278221618741762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25280041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1855 + ... + 7348.

It is an arithmetic number, because the mean of its divisors is an integer number (3285828).

Almost surely, 2^25280641 is an apocalyptic number.

It is an amenable number.

25280641 is a deficient number, since it is larger than the sum of its proper divisors (1005983).

25280641 is an equidigital number, since it uses as much as digits as its factorization.

25280641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9311.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 25280641 is about 5027.9857796139. The cubic root of 25280641 is about 293.4918374020.

Adding to 25280641 its reverse (14608252), we get a palindrome (39888893).

It can be divided in two parts, 25280 and 641, that added together give a square (25921 = 161²).

The spelling of 25280641 in words is "twenty-five million, two hundred eighty thousand, six hundred forty-one".