25450505 has 8 divisors (see below), whose sum is σ = 30575112. Its totient is φ = 20337408.

The previous prime is 25450499. The next prime is 25450507. The reversal of 25450505 is 50505452.

It can be written as a sum of positive squares in 4 ways, for example, as 4583881 + 20866624 = 2141^2 + 4568^2 .

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 25450505 - 2¹² = 25446409 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25450507) 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, 3137 + ... + 7793.

It is an arithmetic number, because the mean of its divisors is an integer number (3821889).

Almost surely, 2^25450505 is an apocalyptic number.

It is an amenable number.

25450505 is a deficient number, since it is larger than the sum of its proper divisors (5124607).

25450505 is a wasteful number, since it uses less digits than its factorization.

25450505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5755.

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 25450505 is about 5044.8493535486. The cubic root of 25450505 is about 294.1477075668.

Adding to 25450505 its reverse (50505452), we get a palindrome (75955957).

The spelling of 25450505 in words is "twenty-five million, four hundred fifty thousand, five hundred five".