25780267 has 4 divisors (see below), whose sum is σ = 26409096. Its totient is φ = 25151440.

The previous prime is 25780241. The next prime is 25780277. The reversal of 25780267 is 76208752.

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 25780267 - 2¹¹ = 25778219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25780277) 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, 314353 + ... + 314434.

It is an arithmetic number, because the mean of its divisors is an integer number (6602274).

Almost surely, 2^25780267 is an apocalyptic number.

25780267 is a deficient number, since it is larger than the sum of its proper divisors (628829).

25780267 is an equidigital number, since it uses as much as digits as its factorization.

25780267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628828.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 25780267 is about 5077.4272028263. The cubic root of 25780267 is about 295.4126829754.

The spelling of 25780267 in words is "twenty-five million, seven hundred eighty thousand, two hundred sixty-seven".