25870105 has 8 divisors (see below), whose sum is σ = 31469832. Its totient is φ = 20412288.

The previous prime is 25870099. The next prime is 25870109. The reversal of 25870105 is 50107852.

It can be written as a sum of positive squares in 4 ways, for example, as 10916416 + 14953689 = 3304^2 + 3867^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25870105 is a prime.

It is a super-2 number, since 2×25870105² = 1338524665422050, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25870109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35074 + ... + 35803.

It is an arithmetic number, because the mean of its divisors is an integer number (3933729).

Almost surely, 2^25870105 is an apocalyptic number.

It is an amenable number.

25870105 is a deficient number, since it is larger than the sum of its proper divisors (5599727).

25870105 is an equidigital number, since it uses as much as digits as its factorization.

25870105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70955.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 25870105 is about 5086.2663123356. The cubic root of 25870105 is about 295.7554324188.

Adding to 25870105 its reverse (50107852), we get a palindrome (75977957).

The spelling of 25870105 in words is "twenty-five million, eight hundred seventy thousand, one hundred five".