25042705 has 4 divisors (see below), whose sum is σ = 30051252. Its totient is φ = 20034160.

The previous prime is 25042697. The next prime is 25042729. The reversal of 25042705 is 50724052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13373649 + 11669056 = 3657^2 + 3416^2 .

It is not a de Polignac number, because 25042705 - 2³ = 25042697 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 25042705.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2504266 + ... + 2504275.

It is an arithmetic number, because the mean of its divisors is an integer number (7512813).

Almost surely, 2^25042705 is an apocalyptic number.

It is an amenable number.

25042705 is a deficient number, since it is larger than the sum of its proper divisors (5008547).

25042705 is an equidigital number, since it uses as much as digits as its factorization.

25042705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5008546.

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 25042705 is about 5004.2686778390. The cubic root of 25042705 is about 292.5681726797.

Adding to 25042705 its reverse (50724052), we get a palindrome (75766757).

The spelling of 25042705 in words is "twenty-five million, forty-two thousand, seven hundred five".