105123156 has 24 divisors (see below), whose sum is σ = 255952704. Its totient is φ = 33517440.

The previous prime is 105123127. The next prime is 105123157. The reversal of 105123156 is 651321501.

It is a super-2 number, since 2×105123156² = 22101755854800672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105123157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190165 + ... + 190716.

It is an arithmetic number, because the mean of its divisors is an integer number (10664696).

Almost surely, 2^105123156 is an apocalyptic number.

It is an amenable number.

105123156 is an abundant number, since it is smaller than the sum of its proper divisors (150829548).

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

105123156 is a wasteful number, since it uses less digits than its factorization.

105123156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380911 (or 380909 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 105123156 is about 10252.9584023344. The cubic root of 105123156 is about 471.9537743201.

Adding to 105123156 its reverse (651321501), we get a palindrome (756444657).

The spelling of 105123156 in words is "one hundred five million, one hundred twenty-three thousand, one hundred fifty-six".