1207215138 has 8 divisors (see below), whose sum is σ = 2414430288. Its totient is φ = 402405044.

The previous prime is 1207215133. The next prime is 1207215181. The reversal of 1207215138 is 8315127021.

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

1207215138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1207215131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100601256 + ... + 100601267.

It is an arithmetic number, because the mean of its divisors is an integer number (301803786).

Almost surely, 2^1207215138 is an apocalyptic number.

1207215138 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.

1207215138 is a wasteful number, since it uses less digits than its factorization.

1207215138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201202528.

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

The square root of 1207215138 is about 34745.0016261332. The cubic root of 1207215138 is about 1064.7841004747.

The spelling of 1207215138 in words is "one billion, two hundred seven million, two hundred fifteen thousand, one hundred thirty-eight".