25428605 has 8 divisors (see below), whose sum is σ = 31090392. Its totient is φ = 19958848.

The previous prime is 25428581. The next prime is 25428607. The reversal of 25428605 is 50682452.

It can be written as a sum of positive squares in 4 ways, for example, as 4507129 + 20921476 = 2123^2 + 4574^2 .

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 25428605 - 2⁸ = 25428349 is a prime.

It is a super-2 number, since 2×25428605² = 1293227904492050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25428607) 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, 47714 + ... + 48243.

It is an arithmetic number, because the mean of its divisors is an integer number (3886299).

Almost surely, 2^25428605 is an apocalyptic number.

It is an amenable number.

25428605 is a deficient number, since it is larger than the sum of its proper divisors (5661787).

25428605 is an equidigital number, since it uses as much as digits as its factorization.

25428605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96015.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 25428605 is about 5042.6783557947. The cubic root of 25428605 is about 294.0633126022.

The spelling of 25428605 in words is "twenty-five million, four hundred twenty-eight thousand, six hundred five".