25721043 has 8 divisors (see below), whose sum is σ = 34449408. Its totient is φ = 17070024.

The previous prime is 25721027. The next prime is 25721071. The reversal of 25721043 is 34012752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25721043 - 2⁴ = 25721027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25721543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18555 + ... + 19892.

It is an arithmetic number, because the mean of its divisors is an integer number (4306176).

Almost surely, 2^25721043 is an apocalyptic number.

25721043 is a deficient number, since it is larger than the sum of its proper divisors (8728365).

25721043 is a wasteful number, since it uses less digits than its factorization.

25721043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38673.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 25721043 is about 5071.5917619619. The cubic root of 25721043 is about 295.1862961926.

Adding to 25721043 its reverse (34012752), we get a palindrome (59733795).

The spelling of 25721043 in words is "twenty-five million, seven hundred twenty-one thousand, forty-three".