25145543 has 2 divisors, whose sum is σ = 25145544. Its totient is φ = 25145542.

The previous prime is 25145539. The next prime is 25145599. The reversal of 25145543 is 34554152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25145543 - 2² = 25145539 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25145143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12572771 + 12572772.

It is an arithmetic number, because the mean of its divisors is an integer number (12572772).

Almost surely, 2^25145543 is an apocalyptic number.

25145543 is a deficient number, since it is larger than the sum of its proper divisors (1).

25145543 is an equidigital number, since it uses as much as digits as its factorization.

25145543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12000, while the sum is 29.

The square root of 25145543 is about 5014.5331786718. The cubic root of 25145543 is about 292.9681033199.

Adding to 25145543 its reverse (34554152), we get a palindrome (59699695).

The spelling of 25145543 in words is "twenty-five million, one hundred forty-five thousand, five hundred forty-three".