105142405 has 4 divisors (see below), whose sum is σ = 126170892. Its totient is φ = 84113920.

The previous prime is 105142391. The next prime is 105142417. The reversal of 105142405 is 504241501.

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 55100929 + 50041476 = 7423^2 + 7074^2 .

It is not a de Polignac number, because 105142405 - 2⁹ = 105141893 is a prime.

It is a super-2 number, since 2×105142405² = 22109850658368050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 10514236 + ... + 10514245.

It is an arithmetic number, because the mean of its divisors is an integer number (31542723).

Almost surely, 2^105142405 is an apocalyptic number.

It is an amenable number.

105142405 is a deficient number, since it is larger than the sum of its proper divisors (21028487).

105142405 is an equidigital number, since it uses as much as digits as its factorization.

105142405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21028486.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 105142405 is about 10253.8970640435. The cubic root of 105142405 is about 471.9825788959.

Adding to 105142405 its reverse (504241501), we get a palindrome (609383906).

It can be divided in two parts, 10 and 5142405, that added together give a palindrome (5142415).

The spelling of 105142405 in words is "one hundred five million, one hundred forty-two thousand, four hundred five".