25065643 has 4 divisors (see below), whose sum is σ = 25078960. Its totient is φ = 25052328.

The previous prime is 25065641. The next prime is 25065647. The reversal of 25065643 is 34656052.

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

It is a cyclic number.

It is not a de Polignac number, because 25065643 - 2¹ = 25065641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25065641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3255 + ... + 7792.

It is an arithmetic number, because the mean of its divisors is an integer number (6269740).

Almost surely, 2^25065643 is an apocalyptic number.

25065643 is a deficient number, since it is larger than the sum of its proper divisors (13317).

25065643 is a wasteful number, since it uses less digits than its factorization.

25065643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13316.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 25065643 is about 5006.5599966444. The cubic root of 25065643 is about 292.6574718830.

The spelling of 25065643 in words is "twenty-five million, sixty-five thousand, six hundred forty-three".