123516005 has 4 divisors (see below), whose sum is σ = 148219212. Its totient is φ = 98812800.

The previous prime is 123515993. The next prime is 123516061. The reversal of 123516005 is 500615321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500615321 = 131 ⋅3821491.

It can be written as a sum of positive squares in 2 ways, for example, as 62457409 + 61058596 = 7903^2 + 7814^2 .

It is not a de Polignac number, because 123516005 - 2⁴ = 123515989 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 12351596 + ... + 12351605.

It is an arithmetic number, because the mean of its divisors is an integer number (37054803).

Almost surely, 2^123516005 is an apocalyptic number.

It is an amenable number.

123516005 is a deficient number, since it is larger than the sum of its proper divisors (24703207).

123516005 is an equidigital number, since it uses as much as digits as its factorization.

123516005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24703206.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 123516005 is about 11113.7754611113. The cubic root of 123516005 is about 498.0134577526.

The spelling of 123516005 in words is "one hundred twenty-three million, five hundred sixteen thousand, five".