25575545 has 8 divisors (see below), whose sum is σ = 30717960. Its totient is φ = 20442240.

The previous prime is 25575541. The next prime is 25575551. The reversal of 25575545 is 54557552.

It can be written as a sum of positive squares in 4 ways, for example, as 2111209 + 23464336 = 1453^2 + 4844^2 .

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

It is not a de Polignac number, because 25575545 - 2² = 25575541 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25575499 and 25575508.

It is not an unprimeable number, because it can be changed into a prime (25575541) 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, 8885 + ... + 11405.

It is an arithmetic number, because the mean of its divisors is an integer number (3839745).

Almost surely, 2^25575545 is an apocalyptic number.

It is an amenable number.

25575545 is a deficient number, since it is larger than the sum of its proper divisors (5142415).

25575545 is a wasteful number, since it uses less digits than its factorization.

25575545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4555.

The product of its digits is 175000, while the sum is 38.

The square root of 25575545 is about 5057.2270069674. The cubic root of 25575545 is about 294.6286431273.

The spelling of 25575545 in words is "twenty-five million, five hundred seventy-five thousand, five hundred forty-five".