25545545 has 8 divisors (see below), whose sum is σ = 30952896. Its totient is φ = 20237616.

The previous prime is 25545539. The next prime is 25545563. The reversal of 25545545 is 54554552.

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 25545545 - 2¹² = 25541449 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24287 + ... + 25316.

It is an arithmetic number, because the mean of its divisors is an integer number (3869112).

Almost surely, 2^25545545 is an apocalyptic number.

It is an amenable number.

25545545 is a deficient number, since it is larger than the sum of its proper divisors (5407351).

25545545 is a wasteful number, since it uses less digits than its factorization.

25545545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49711.

The product of its digits is 100000, while the sum is 35.

The square root of 25545545 is about 5054.2600843249. The cubic root of 25545545 is about 294.5133986946.

The spelling of 25545545 in words is "twenty-five million, five hundred forty-five thousand, five hundred forty-five".