1200000123 has 32 divisors (see below), whose sum is σ = 2039385600. Its totient is φ = 683136288.

The previous prime is 1200000121. The next prime is 1200000133. The reversal of 1200000123 is 3210000021.

It is a happy number.

1200000123 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1200000123 - 2¹ = 1200000121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1200000121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39040 + ... + 62642.

It is an arithmetic number, because the mean of its divisors is an integer number (63730800).

Almost surely, 2^1200000123 is an apocalyptic number.

1200000123 is a deficient number, since it is larger than the sum of its proper divisors (839385477).

1200000123 is a wasteful number, since it uses less digits than its factorization.

1200000123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23888 (or 23882 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1200000123 is about 34641.0179267296. The cubic root of 1200000123 is about 1062.6586054901.

Adding to 1200000123 its reverse (3210000021), we get a palindrome (4410000144).

The spelling of 1200000123 in words is "one billion, two hundred million, one hundred twenty-three", and thus it is an aban number.