25278943 has 2 divisors, whose sum is σ = 25278944. Its totient is φ = 25278942.

The previous prime is 25278941. The next prime is 25278977. The reversal of 25278943 is 34987252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25278943 - 2¹ = 25278941 is a prime.

Together with 25278941, it forms a pair of twin primes.

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

It is a junction number, because it is equal to n+sod(n) for n = 25278896 and 25278905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25278941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12639471 + 12639472.

It is an arithmetic number, because the mean of its divisors is an integer number (12639472).

Almost surely, 2^25278943 is an apocalyptic number.

25278943 is a deficient number, since it is larger than the sum of its proper divisors (1).

25278943 is an equidigital number, since it uses as much as digits as its factorization.

25278943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The square root of 25278943 is about 5027.8169218857. The cubic root of 25278943 is about 293.4852663622.

The spelling of 25278943 in words is "twenty-five million, two hundred seventy-eight thousand, nine hundred forty-three".