25542245 has 8 divisors (see below), whose sum is σ = 32453784. Its totient is φ = 19231744.

The previous prime is 25542229. The next prime is 25542269. The reversal of 25542245 is 54224552.

25542245 = 300² + 301² + ... + 469².

It can be written as a sum of positive squares in 4 ways, for example, as 7300804 + 18241441 = 2702^2 + 4271^2 .

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 25542245 - 2⁴ = 25542229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent 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, 150164 + ... + 150333.

It is an arithmetic number, because the mean of its divisors is an integer number (4056723).

Almost surely, 2^25542245 is an apocalyptic number.

It is an amenable number.

25542245 is a deficient number, since it is larger than the sum of its proper divisors (6911539).

25542245 is a wasteful number, since it uses less digits than its factorization.

25542245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300519.

The product of its digits is 16000, while the sum is 29.

The square root of 25542245 is about 5053.9336165011. The cubic root of 25542245 is about 294.5007162997.

Adding to 25542245 its reverse (54224552), we get a palindrome (79766797).

The spelling of 25542245 in words is "twenty-five million, five hundred forty-two thousand, two hundred forty-five".