1206135042 has 64 divisors (see below), whose sum is σ = 2969616384. Its totient is φ = 318985920.

The previous prime is 1206135017. The next prime is 1206135043. The reversal of 1206135042 is 2405316021.

It is not an unprimeable number, because it can be changed into a prime (1206135043) 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, 9808 + ... + 50084.

It is an arithmetic number, because the mean of its divisors is an integer number (46400256).

Almost surely, 2^1206135042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1206135042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1484808192).

1206135042 is an abundant number, since it is smaller than the sum of its proper divisors (1763481342).

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

1206135042 is a wasteful number, since it uses less digits than its factorization.

1206135042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40343.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1206135042 is about 34729.4549626106. The cubic root of 1206135042 is about 1064.4664514296.

The spelling of 1206135042 in words is "one billion, two hundred six million, one hundred thirty-five thousand, forty-two".