123152105 has 4 divisors (see below), whose sum is σ = 147782532. Its totient is φ = 98521680.

The previous prime is 123152101. The next prime is 123152123. The reversal of 123152105 is 501251321.

It is a happy number.

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 83411689 + 39740416 = 9133^2 + 6304^2 .

It is not a de Polignac number, because 123152105 - 2² = 123152101 is a prime.

It is a super-3 number, since 3×123152105³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123152101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12315206 + ... + 12315215.

It is an arithmetic number, because the mean of its divisors is an integer number (36945633).

Almost surely, 2^123152105 is an apocalyptic number.

It is an amenable number.

123152105 is a deficient number, since it is larger than the sum of its proper divisors (24630427).

123152105 is an equidigital number, since it uses as much as digits as its factorization.

123152105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24630426.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 123152105 is about 11097.3918106914. The cubic root of 123152105 is about 497.5238980801.

The spelling of 123152105 in words is "one hundred twenty-three million, one hundred fifty-two thousand, one hundred five".