25122605 has 8 divisors (see below), whose sum is σ = 30181272. Its totient is φ = 20075328.

The previous prime is 25122599. The next prime is 25122607. The reversal of 25122605 is 50622152.

It can be written as a sum of positive squares in 4 ways, for example, as 3759721 + 21362884 = 1939^2 + 4622^2 .

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 25122605 - 2⁴ = 25122589 is a prime.

It is a super-2 number, since 2×25122605² = 1262290563972050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25122607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3167 + ... + 7763.

It is an arithmetic number, because the mean of its divisors is an integer number (3772659).

Almost surely, 2^25122605 is an apocalyptic number.

It is an amenable number.

25122605 is a deficient number, since it is larger than the sum of its proper divisors (5058667).

25122605 is a wasteful number, since it uses less digits than its factorization.

25122605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5695.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 25122605 is about 5012.2455047613. The cubic root of 25122605 is about 292.8789934689.

Adding to 25122605 its reverse (50622152), we get a palindrome (75744757).

The spelling of 25122605 in words is "twenty-five million, one hundred twenty-two thousand, six hundred five".