25000043 has 4 divisors (see below), whose sum is σ = 25806528. Its totient is φ = 24193560.

The previous prime is 25000033. The next prime is 25000069. The reversal of 25000043 is 34000052.

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 25000043 - 2¹² = 24995947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 24999991 and 25000027.

It is not an unprimeable number, because it can be changed into a prime (25000033) 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, 403196 + ... + 403257.

It is an arithmetic number, because the mean of its divisors is an integer number (6451632).

Almost surely, 2^25000043 is an apocalyptic number.

25000043 is a deficient number, since it is larger than the sum of its proper divisors (806485).

25000043 is an equidigital number, since it uses as much as digits as its factorization.

25000043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806484.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 25000043 is about 5000.0042999982. The cubic root of 25000043 is about 292.4019414649.

Adding to 25000043 its reverse (34000052), we get a palindrome (59000095).

Subtracting 25000043 from its reverse (34000052), we obtain a palindrome (9000009).

The spelling of 25000043 in words is "twenty-five million, forty-three", and thus it is an aban number and an uban number.