105121405 has 8 divisors (see below), whose sum is σ = 126558432. Its totient is φ = 83821968.

The previous prime is 105121397. The next prime is 105121411. The reversal of 105121405 is 504121501.

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

It is a cyclic number.

It is not a de Polignac number, because 105121405 - 2³ = 105121397 is a prime.

It is a super-2 number, since 2×105121405² = 22101019578348050, 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 7 ways as a sum of consecutive naturals, for example, 32707 + ... + 35776.

It is an arithmetic number, because the mean of its divisors is an integer number (15819804).

Almost surely, 2^105121405 is an apocalyptic number.

It is an amenable number.

105121405 is a deficient number, since it is larger than the sum of its proper divisors (21437027).

105121405 is an equidigital number, since it uses as much as digits as its factorization.

105121405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68795.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 105121405 is about 10252.8730119903. The cubic root of 105121405 is about 471.9511539153.

Adding to 105121405 its reverse (504121501), we get a palindrome (609242906).

The spelling of 105121405 in words is "one hundred five million, one hundred twenty-one thousand, four hundred five".