1200715123 has 4 divisors (see below), whose sum is σ = 1206405928. Its totient is φ = 1195024320.

The previous prime is 1200715121. The next prime is 1200715129. The reversal of 1200715123 is 3215170021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1200715123 - 2¹ = 1200715121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200715094 and 1200715103.

It is not an unprimeable number, because it can be changed into a prime (1200715121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2845086 + ... + 2845507.

It is an arithmetic number, because the mean of its divisors is an integer number (301601482).

Almost surely, 2^1200715123 is an apocalyptic number.

1200715123 is a deficient number, since it is larger than the sum of its proper divisors (5690805).

1200715123 is an equidigital number, since it uses as much as digits as its factorization.

1200715123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5690804.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 1200715123 is about 34651.3365254502. The cubic root of 1200715123 is about 1062.8696193707.

Adding to 1200715123 its reverse (3215170021), we get a palindrome (4415885144).

The spelling of 1200715123 in words is "one billion, two hundred million, seven hundred fifteen thousand, one hundred twenty-three".