25954381 has 2 divisors, whose sum is σ = 25954382. Its totient is φ = 25954380.

The previous prime is 25954367. The next prime is 25954403. The reversal of 25954381 is 18345952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25918281 + 36100 = 5091^2 + 190^2 .

It is a cyclic number.

It is not a de Polignac number, because 25954381 - 2¹⁵ = 25921613 is a prime.

It is a super-2 number, since 2×25954381² = 1347259786186322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25954381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25954321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12977190 + 12977191.

It is an arithmetic number, because the mean of its divisors is an integer number (12977191).

Almost surely, 2^25954381 is an apocalyptic number.

It is an amenable number.

25954381 is a deficient number, since it is larger than the sum of its proper divisors (1).

25954381 is an equidigital number, since it uses as much as digits as its factorization.

25954381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 37.

The square root of 25954381 is about 5094.5442386930. The cubic root of 25954381 is about 296.0762411655.

It can be divided in two parts, 25954 and 381, that added together give a triangular number (26335 = T₂₂₉).

The spelling of 25954381 in words is "twenty-five million, nine hundred fifty-four thousand, three hundred eighty-one".