25443461 has 2 divisors, whose sum is σ = 25443462. Its totient is φ = 25443460.

The previous prime is 25443443. The next prime is 25443463. The reversal of 25443461 is 16434452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23136100 + 2307361 = 4810^2 + 1519^2 .

It is a cyclic number.

It is not a de Polignac number, because 25443461 - 2¹⁰ = 25442437 is a prime.

It is a Sophie Germain prime.

Together with 25443463, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25443463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12721730 + 12721731.

It is an arithmetic number, because the mean of its divisors is an integer number (12721731).

Almost surely, 2^25443461 is an apocalyptic number.

It is an amenable number.

25443461 is a deficient number, since it is larger than the sum of its proper divisors (1).

25443461 is an equidigital number, since it uses as much as digits as its factorization.

25443461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 29.

The square root of 25443461 is about 5044.1511674414. The cubic root of 25443461 is about 294.1205677302.

Subtracting from 25443461 its reverse (16434452), we obtain a palindrome (9009009).

The spelling of 25443461 in words is "twenty-five million, four hundred forty-three thousand, four hundred sixty-one".