25400105 has 4 divisors (see below), whose sum is σ = 30480132. Its totient is φ = 20320080.

The previous prime is 25400083. The next prime is 25400147. The reversal of 25400105 is 50100452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8202496 + 17197609 = 2864^2 + 4147^2 .

It is not a de Polignac number, because 25400105 - 2⁸ = 25399849 is a prime.

It is a super-2 number, since 2×25400105² = 1290330668022050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2540006 + ... + 2540015.

It is an arithmetic number, because the mean of its divisors is an integer number (7620033).

Almost surely, 2^25400105 is an apocalyptic number.

It is an amenable number.

25400105 is a deficient number, since it is larger than the sum of its proper divisors (5080027).

25400105 is an equidigital number, since it uses as much as digits as its factorization.

25400105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5080026.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 25400105 is about 5039.8516843256. The cubic root of 25400105 is about 293.9534109464.

Adding to 25400105 its reverse (50100452), we get a palindrome (75500557).

The spelling of 25400105 in words is "twenty-five million, four hundred thousand, one hundred five".