25780901 has 4 divisors (see below), whose sum is σ = 26021952. Its totient is φ = 25539852.

The previous prime is 25780889. The next prime is 25780919. The reversal of 25780901 is 10908752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25780901 - 2²² = 21586597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25780921) 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, 120365 + ... + 120578.

It is an arithmetic number, because the mean of its divisors is an integer number (6505488).

Almost surely, 2^25780901 is an apocalyptic number.

It is an amenable number.

25780901 is a deficient number, since it is larger than the sum of its proper divisors (241051).

25780901 is a wasteful number, since it uses less digits than its factorization.

25780901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241050.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 25780901 is about 5077.4896356369. The cubic root of 25780901 is about 295.4151045964.

The spelling of 25780901 in words is "twenty-five million, seven hundred eighty thousand, nine hundred one".