25121002145 has 8 divisors (see below), whose sum is σ = 30146354304. Its totient is φ = 20096033904.

The previous prime is 25121002097. The next prime is 25121002163. The reversal of 25121002145 is 54120012152.

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 25121002145 - 2¹⁶ = 25120936609 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 25121002145.

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, 75992 + ... + 236678.

It is an arithmetic number, because the mean of its divisors is an integer number (3768294288).

Almost surely, 2^25121002145 is an apocalyptic number.

It is an amenable number.

25121002145 is a deficient number, since it is larger than the sum of its proper divisors (5025352159).

25121002145 is a wasteful number, since it uses less digits than its factorization.

25121002145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191959.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 25121002145 its reverse (54120012152), we get a palindrome (79241014297).

The spelling of 25121002145 in words is "twenty-five billion, one hundred twenty-one million, two thousand, one hundred forty-five".