25605043 has 4 divisors (see below), whose sum is σ = 27111240. Its totient is φ = 24098848.

The previous prime is 25605037. The next prime is 25605059. The reversal of 25605043 is 34050652.

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 25605043 - 2⁵ = 25605011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25604999 and 25605017.

It is not an unprimeable number, because it can be changed into a prime (25605023) 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, 753073 + ... + 753106.

It is an arithmetic number, because the mean of its divisors is an integer number (6777810).

Almost surely, 2^25605043 is an apocalyptic number.

25605043 is a deficient number, since it is larger than the sum of its proper divisors (1506197).

25605043 is a wasteful number, since it uses less digits than its factorization.

25605043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506196.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 25605043 is about 5060.1425869238. The cubic root of 25605043 is about 294.7418712986.

Adding to 25605043 its reverse (34050652), we get a palindrome (59655695).

The spelling of 25605043 in words is "twenty-five million, six hundred five thousand, forty-three".