105640025 has 12 divisors (see below), whose sum is σ = 131783232. Its totient is φ = 84002640.

The previous prime is 105640001. The next prime is 105640027. The reversal of 105640025 is 520046501.

It is not a de Polignac number, because 105640025 - 2¹⁶ = 105574489 is a prime.

It is a super-2 number, since 2×105640025² = 22319629764001250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105640027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8477 + ... + 16826.

It is an arithmetic number, because the mean of its divisors is an integer number (10981936).

Almost surely, 2^105640025 is an apocalyptic number.

It is an amenable number.

105640025 is a deficient number, since it is larger than the sum of its proper divisors (26143207).

105640025 is a wasteful number, since it uses less digits than its factorization.

105640025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25480 (or 25475 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 105640025 is about 10278.1333421979. The cubic root of 105640025 is about 472.7260100323.

Adding to 105640025 its reverse (520046501), we get a palindrome (625686526).

The spelling of 105640025 in words is "one hundred five million, six hundred forty thousand, twenty-five".