25278767 has 2 divisors, whose sum is σ = 25278768. Its totient is φ = 25278766.

The previous prime is 25278763. The next prime is 25278811. The reversal of 25278767 is 76787252.

It is a happy number.

It is an a-pointer prime, because the next prime (25278811) can be obtained adding 25278767 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25278767 - 2² = 25278763 is a prime.

It is a super-2 number, since 2×25278767² = 1278032122080578, which contains 22 as substring.

It is a Chen prime.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25278763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12639383 + 12639384.

It is an arithmetic number, because the mean of its divisors is an integer number (12639384).

Almost surely, 2^25278767 is an apocalyptic number.

25278767 is a deficient number, since it is larger than the sum of its proper divisors (1).

25278767 is an equidigital number, since it uses as much as digits as its factorization.

25278767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 329280, while the sum is 44.

The square root of 25278767 is about 5027.7994192291. The cubic root of 25278767 is about 293.4845852482.

The spelling of 25278767 in words is "twenty-five million, two hundred seventy-eight thousand, seven hundred sixty-seven".