1205135141 has 4 divisors (see below), whose sum is σ = 1377297312. Its totient is φ = 1032972972.

The previous prime is 1205135119. The next prime is 1205135153. The reversal of 1205135141 is 1415315021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1205135141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205135101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86081075 + ... + 86081088.

It is an arithmetic number, because the mean of its divisors is an integer number (344324328).

Almost surely, 2^1205135141 is an apocalyptic number.

It is an amenable number.

1205135141 is a deficient number, since it is larger than the sum of its proper divisors (172162171).

1205135141 is an equidigital number, since it uses as much as digits as its factorization.

1205135141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172162170.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1205135141 is about 34715.0564020858. The cubic root of 1205135141 is about 1064.1722181167.

The spelling of 1205135141 in words is "one billion, two hundred five million, one hundred thirty-five thousand, one hundred forty-one".