30134821 has 4 divisors (see below), whose sum is σ = 31106944. Its totient is φ = 29162700.

The previous prime is 30134773. The next prime is 30134831. The reversal of 30134821 is 12843103.

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 not a de Polignac number, because 30134821 - 2¹⁹ = 29610533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30134792 and 30134801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30134831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486015 + ... + 486076.

It is an arithmetic number, because the mean of its divisors is an integer number (7776736).

Almost surely, 2^30134821 is an apocalyptic number.

30134821 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

30134821 is a deficient number, since it is larger than the sum of its proper divisors (972123).

30134821 is an equidigital number, since it uses as much as digits as its factorization.

30134821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972122.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 30134821 is about 5489.5191957038. The cubic root of 30134821 is about 311.1880219384.

Adding to 30134821 its reverse (12843103), we get a palindrome (42977924).

The spelling of 30134821 in words is "thirty million, one hundred thirty-four thousand, eight hundred twenty-one".