1205155133 has 8 divisors (see below), whose sum is σ = 1483267968. Its totient is φ = 953529264.

The previous prime is 1205155099. The next prime is 1205155139. The reversal of 1205155133 is 3315515021.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1205155133 - 2⁶ = 1205155069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205155139) 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, 6621641 + ... + 6621822.

It is an arithmetic number, because the mean of its divisors is an integer number (185408496).

Almost surely, 2^1205155133 is an apocalyptic number.

1205155133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1205155133 is a deficient number, since it is larger than the sum of its proper divisors (278112835).

1205155133 is a wasteful number, since it uses less digits than its factorization.

1205155133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13243483.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 1205155133 is about 34715.3443451163. The cubic root of 1205155133 is about 1064.1781026057.

The spelling of 1205155133 in words is "one billion, two hundred five million, one hundred fifty-five thousand, one hundred thirty-three".