155112729 has 8 divisors (see below), whose sum is σ = 207641952. Its totient is φ = 102996000.

The previous prime is 155112719. The next prime is 155112757. The reversal of 155112729 is 927211551.

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

It is not a de Polignac number, because 155112729 - 2⁵ = 155112697 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 155112729.

It is not an unprimeable number, because it can be changed into a prime (155112719) 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, 102244 + ... + 103749.

It is an arithmetic number, because the mean of its divisors is an integer number (25955244).

Almost surely, 2^155112729 is an apocalyptic number.

It is an amenable number.

155112729 is a deficient number, since it is larger than the sum of its proper divisors (52529223).

155112729 is a wasteful number, since it uses less digits than its factorization.

155112729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206247.

The product of its digits is 6300, while the sum is 33.

The square root of 155112729 is about 12454.4260807152. The cubic root of 155112729 is about 537.2987286078.

The spelling of 155112729 in words is "one hundred fifty-five million, one hundred twelve thousand, seven hundred twenty-nine".