105161994 has 48 divisors (see below), whose sum is σ = 264308928. Its totient is φ = 29595456.

The previous prime is 105161977. The next prime is 105162019. The reversal of 105161994 is 499161501.

It is a super-2 number, since 2×105161994² = 22118089964112072, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2214 + ... + 14670.

It is an arithmetic number, because the mean of its divisors is an integer number (5506436).

Almost surely, 2^105161994 is an apocalyptic number.

105161994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 105161994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132154464).

105161994 is an abundant number, since it is smaller than the sum of its proper divisors (159146934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

105161994 is a wasteful number, since it uses less digits than its factorization.

105161994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12539 (or 12536 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 105161994 is about 10254.8522173652. The cubic root of 105161994 is about 472.0118886453.

The spelling of 105161994 in words is "one hundred five million, one hundred sixty-one thousand, nine hundred ninety-four".