25951481 has 2 divisors, whose sum is σ = 25951482. Its totient is φ = 25951480.

The previous prime is 25951451. The next prime is 25951543. The reversal of 25951481 is 18415952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21307456 + 4644025 = 4616^2 + 2155^2 .

It is a cyclic number.

It is not a de Polignac number, because 25951481 - 2¹⁸ = 25689337 is a prime.

It is a super-3 number, since 3×25951481³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (25951411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12975740 + 12975741.

It is an arithmetic number, because the mean of its divisors is an integer number (12975741).

Almost surely, 2^25951481 is an apocalyptic number.

It is an amenable number.

25951481 is a deficient number, since it is larger than the sum of its proper divisors (1).

25951481 is an equidigital number, since it uses as much as digits as its factorization.

25951481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 35.

The square root of 25951481 is about 5094.2596125443. The cubic root of 25951481 is about 296.0652134437.

The spelling of 25951481 in words is "twenty-five million, nine hundred fifty-one thousand, four hundred eighty-one".