25446481 has 2 divisors, whose sum is σ = 25446482. Its totient is φ = 25446480.

The previous prime is 25446479. The next prime is 25446493. The reversal of 25446481 is 18464452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25160256 + 286225 = 5016^2 + 535^2 .

It is a cyclic number.

It is not a de Polignac number, because 25446481 - 2¹ = 25446479 is a prime.

It is a super-2 number, since 2×25446481² = 1295046790566722, which contains 22 as substring.

Together with 25446479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25446401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12723240 + 12723241.

It is an arithmetic number, because the mean of its divisors is an integer number (12723241).

Almost surely, 2^25446481 is an apocalyptic number.

It is an amenable number.

25446481 is a deficient number, since it is larger than the sum of its proper divisors (1).

25446481 is an equidigital number, since it uses as much as digits as its factorization.

25446481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 34.

The square root of 25446481 is about 5044.4505151701. The cubic root of 25446481 is about 294.1322041054.

It can be divided in two parts, 2544 and 6481, that added together give a square (9025 = 95²).

The spelling of 25446481 in words is "twenty-five million, four hundred forty-six thousand, four hundred eighty-one".