105121645 has 8 divisors (see below), whose sum is σ = 126491904. Its totient is φ = 83866704.

The previous prime is 105121633. The next prime is 105121673. The reversal of 105121645 is 546121501.

It is a happy number.

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 105121645 - 2⁵ = 105121613 is a prime.

It is a super-3 number, since 3×105121645³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 26809 + ... + 30478.

It is an arithmetic number, because the mean of its divisors is an integer number (15811488).

Almost surely, 2^105121645 is an apocalyptic number.

It is an amenable number.

105121645 is a deficient number, since it is larger than the sum of its proper divisors (21370259).

105121645 is an equidigital number, since it uses as much as digits as its factorization.

105121645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57659.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 105121645 is about 10252.8847160202. The cubic root of 105121645 is about 471.9515130816.

The spelling of 105121645 in words is "one hundred five million, one hundred twenty-one thousand, six hundred forty-five".