30157129 has 4 divisors (see below), whose sum is σ = 31197060. Its totient is φ = 29117200.

The previous prime is 30157111. The next prime is 30157157. The reversal of 30157129 is 92175103.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7689529 + 22467600 = 2773^2 + 4740^2 .

It is a cyclic number.

It is not a de Polignac number, because 30157129 - 2⁵ = 30157097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30157097 and 30157106.

It is not an unprimeable number, because it can be changed into a prime (30157229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519922 + ... + 519979.

It is an arithmetic number, because the mean of its divisors is an integer number (7799265).

Almost surely, 2^30157129 is an apocalyptic number.

It is an amenable number.

30157129 is a deficient number, since it is larger than the sum of its proper divisors (1039931).

30157129 is a wasteful number, since it uses less digits than its factorization.

30157129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039930.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 30157129 is about 5491.5506917445. The cubic root of 30157129 is about 311.2647910478.

The spelling of 30157129 in words is "thirty million, one hundred fifty-seven thousand, one hundred twenty-nine".