25440105 has 32 divisors (see below), whose sum is σ = 42456960. Its totient is φ = 12992000.

The previous prime is 25440091. The next prime is 25440167. The reversal of 25440105 is 50104452.

It is not a de Polignac number, because 25440105 - 2¹¹ = 25438057 is a prime.

It is a super-2 number, since 2×25440105² = 1294397884822050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101230 + ... + 101480.

It is an arithmetic number, because the mean of its divisors is an integer number (1326780).

Almost surely, 2^25440105 is an apocalyptic number.

It is an amenable number.

25440105 is a deficient number, since it is larger than the sum of its proper divisors (17016855).

25440105 is a wasteful number, since it uses less digits than its factorization.

25440105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 25440105 is about 5043.8184939587. The cubic root of 25440105 is about 294.1076356318.

Adding to 25440105 its reverse (50104452), we get a palindrome (75544557).

The spelling of 25440105 in words is "twenty-five million, four hundred forty thousand, one hundred five".