25901851 has 4 divisors (see below), whose sum is σ = 25912432. Its totient is φ = 25891272.

The previous prime is 25901849. The next prime is 25901857. The reversal of 25901851 is 15810952.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25901851 - 2¹ = 25901849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25901857) 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, 481 + ... + 7213.

It is an arithmetic number, because the mean of its divisors is an integer number (6478108).

Almost surely, 2^25901851 is an apocalyptic number.

25901851 is a deficient number, since it is larger than the sum of its proper divisors (10581).

25901851 is an equidigital number, since it uses as much as digits as its factorization.

25901851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10580.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 25901851 is about 5089.3861122929. The cubic root of 25901851 is about 295.8763598244.

The spelling of 25901851 in words is "twenty-five million, nine hundred one thousand, eight hundred fifty-one".