27561025 has 6 divisors (see below), whose sum is σ = 34175702. Its totient is φ = 22048800.

The previous prime is 27561019. The next prime is 27561047. The reversal of 27561025 is 52016572.

It can be written as a sum of positive squares in 3 ways, for example, as 3236401 + 24324624 = 1799^2 + 4932^2 .

It is not a de Polignac number, because 27561025 - 2¹⁷ = 27429953 is a prime.

It is a super-2 number, since 2×27561025² = 1519220198101250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27560984 and 27561002.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 551196 + ... + 551245.

Almost surely, 2^27561025 is an apocalyptic number.

27561025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27561025 is a deficient number, since it is larger than the sum of its proper divisors (6614677).

27561025 is a wasteful number, since it uses less digits than its factorization.

27561025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102451 (or 1102446 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 27561025 is about 5249.8595219301. The cubic root of 27561025 is about 302.0636424211.

Adding to 27561025 its reverse (52016572), we get a palindrome (79577597).

The spelling of 27561025 in words is "twenty-seven million, five hundred sixty-one thousand, twenty-five".