25105145 has 8 divisors (see below), whose sum is σ = 32443656. Its totient is φ = 18539136.

The previous prime is 25105139. The next prime is 25105147. The reversal of 25105145 is 54150152.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 344569 + 24760576 = 587^2 + 4976^2 .

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 25105145 - 2⁸ = 25104889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25105145.

It is not an unprimeable number, because it can be changed into a prime (25105147) 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, 193052 + ... + 193181.

It is an arithmetic number, because the mean of its divisors is an integer number (4055457).

Almost surely, 2^25105145 is an apocalyptic number.

It is an amenable number.

25105145 is a deficient number, since it is larger than the sum of its proper divisors (7338511).

25105145 is a wasteful number, since it uses less digits than its factorization.

25105145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386251.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 25105145 is about 5010.5034677166. The cubic root of 25105145 is about 292.8111282623.

Adding to 25105145 its reverse (54150152), we get a palindrome (79255297).

The spelling of 25105145 in words is "twenty-five million, one hundred five thousand, one hundred forty-five".