105421265 has 4 divisors (see below), whose sum is σ = 126505524. Its totient is φ = 84337008.

The previous prime is 105421223. The next prime is 105421273. The reversal of 105421265 is 562124501.

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 57866449 + 47554816 = 7607^2 + 6896^2 .

It is a cyclic number.

It is not a de Polignac number, because 105421265 - 2⁸ = 105421009 is a prime.

It is a super-2 number, since 2×105421265² = 22227286228400450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10542122 + ... + 10542131.

It is an arithmetic number, because the mean of its divisors is an integer number (31626381).

Almost surely, 2^105421265 is an apocalyptic number.

It is an amenable number.

105421265 is a deficient number, since it is larger than the sum of its proper divisors (21084259).

105421265 is an equidigital number, since it uses as much as digits as its factorization.

105421265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21084258.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 105421265 is about 10267.4858168882. The cubic root of 105421265 is about 472.3994765764.

Adding to 105421265 its reverse (562124501), we get a palindrome (667545766).

The spelling of 105421265 in words is "one hundred five million, four hundred twenty-one thousand, two hundred sixty-five".