25278967 has 4 divisors (see below), whose sum is σ = 28890256. Its totient is φ = 21667680.

The previous prime is 25278943. The next prime is 25278977. The reversal of 25278967 is 76987252.

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 25278967 - 2⁷ = 25278839 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25278907) 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, 1805634 + ... + 1805647.

It is an arithmetic number, because the mean of its divisors is an integer number (7222564).

Almost surely, 2^25278967 is an apocalyptic number.

25278967 is a deficient number, since it is larger than the sum of its proper divisors (3611289).

25278967 is an equidigital number, since it uses as much as digits as its factorization.

25278967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3611288.

The product of its digits is 423360, while the sum is 46.

The square root of 25278967 is about 5027.8193086069. The cubic root of 25278967 is about 293.4853592411.

The spelling of 25278967 in words is "twenty-five million, two hundred seventy-eight thousand, nine hundred sixty-seven".