155730729 has 16 divisors (see below), whose sum is σ = 258877440. Its totient is φ = 80898960.

The previous prime is 155730719. The next prime is 155730737. The reversal of 155730729 is 927037551.

It is not a de Polignac number, because 155730729 - 2¹² = 155726633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155730719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336849 + ... + 337310.

It is an arithmetic number, because the mean of its divisors is an integer number (16179840).

Almost surely, 2^155730729 is an apocalyptic number.

It is an amenable number.

155730729 is a deficient number, since it is larger than the sum of its proper divisors (103146711).

155730729 is a wasteful number, since it uses less digits than its factorization.

155730729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674180.

The product of its (nonzero) digits is 66150, while the sum is 39.

The square root of 155730729 is about 12479.2118741530. The cubic root of 155730729 is about 538.0113514094.

The spelling of 155730729 in words is "one hundred fifty-five million, seven hundred thirty thousand, seven hundred twenty-nine".