1260000138 has 8 divisors (see below), whose sum is σ = 2520000288. Its totient is φ = 420000044.

The previous prime is 1260000107. The next prime is 1260000163. The reversal of 1260000138 is 8310000621.

It is a sphenic number, since it is the product of 3 distinct primes.

1260000138 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105000006 + ... + 105000017.

It is an arithmetic number, because the mean of its divisors is an integer number (315000036).

Almost surely, 2^1260000138 is an apocalyptic number.

1260000138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1260000138 is a wasteful number, since it uses less digits than its factorization.

1260000138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210000028.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1260000138 is about 35496.4806424524. The cubic root of 1260000138 is about 1080.0823376869.

Adding to 1260000138 its reverse (8310000621), we get a palindrome (9570000759).

The spelling of 1260000138 in words is "one billion, two hundred sixty million, one hundred thirty-eight", and thus it is an aban number.