25012145 has 8 divisors (see below), whose sum is σ = 30312360. Its totient is φ = 19811200.

The previous prime is 25012103. The next prime is 25012153. The reversal of 25012145 is 54121052.

It can be written as a sum of positive squares in 4 ways, for example, as 2582449 + 22429696 = 1607^2 + 4736^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25012145 - 2¹⁰ = 25011121 is a prime.

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

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, 24260 + ... + 25269.

It is an arithmetic number, because the mean of its divisors is an integer number (3789045).

Almost surely, 2^25012145 is an apocalyptic number.

It is an amenable number.

25012145 is a deficient number, since it is larger than the sum of its proper divisors (5300215).

25012145 is a wasteful number, since it uses less digits than its factorization.

25012145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49635.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 25012145 is about 5001.2143525348. The cubic root of 25012145 is about 292.4491157498.

Adding to 25012145 its reverse (54121052), we get a palindrome (79133197).

The spelling of 25012145 in words is "twenty-five million, twelve thousand, one hundred forty-five".