1207512138 has 16 divisors (see below), whose sum is σ = 2760027840. Its totient is φ = 345003456.

The previous prime is 1207512133. The next prime is 1207512139. The reversal of 1207512138 is 8312157021.

1207512138 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1207512133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14375103 + ... + 14375186.

It is an arithmetic number, because the mean of its divisors is an integer number (172501740).

Almost surely, 2^1207512138 is an apocalyptic number.

1207512138 is an abundant number, since it is smaller than the sum of its proper divisors (1552515702).

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

1207512138 is a wasteful number, since it uses less digits than its factorization.

1207512138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28750301.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 1207512138 is about 34749.2753593510. The cubic root of 1207512138 is about 1064.8714129836.

Adding to 1207512138 its reverse (8312157021), we get a palindrome (9519669159).

The spelling of 1207512138 in words is "one billion, two hundred seven million, five hundred twelve thousand, one hundred thirty-eight".