25485643 has 4 divisors (see below), whose sum is σ = 25520688. Its totient is φ = 25450600.

The previous prime is 25485623. The next prime is 25485667. The reversal of 25485643 is 34658452.

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 25485643 - 2⁵ = 25485611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25485623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16408 + ... + 17893.

It is an arithmetic number, because the mean of its divisors is an integer number (6380172).

Almost surely, 2^25485643 is an apocalyptic number.

25485643 is a deficient number, since it is larger than the sum of its proper divisors (35045).

25485643 is an equidigital number, since it uses as much as digits as its factorization.

25485643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35044.

The product of its digits is 115200, while the sum is 37.

The square root of 25485643 is about 5048.3307142064. The cubic root of 25485643 is about 294.2830160690.

The spelling of 25485643 in words is "twenty-five million, four hundred eighty-five thousand, six hundred forty-three".