25400043 has 12 divisors (see below), whose sum is σ = 36733320. Its totient is φ = 16912896.

The previous prime is 25400021. The next prime is 25400047. The reversal of 25400043 is 34000452.

It is a happy number.

It is not a de Polignac number, because 25400043 - 2¹⁰ = 25399019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25399989 and 25400025.

It is not an unprimeable number, because it can be changed into a prime (25400047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11680 + ... + 13682.

It is an arithmetic number, because the mean of its divisors is an integer number (3061110).

Almost surely, 2^25400043 is an apocalyptic number.

25400043 is a deficient number, since it is larger than the sum of its proper divisors (11333277).

25400043 is a wasteful number, since it uses less digits than its factorization.

25400043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418 (or 3415 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 25400043 is about 5039.8455333472. The cubic root of 25400043 is about 293.9531717725.

Adding to 25400043 its reverse (34000452), we get a palindrome (59400495).

It can be divided in two parts, 2 and 5400043, that added together give a palindrome (5400045).

The spelling of 25400043 in words is "twenty-five million, four hundred thousand, forty-three".