30461021 has 4 divisors (see below), whose sum is σ = 30960444. Its totient is φ = 29961600.

The previous prime is 30461017. The next prime is 30461023. The reversal of 30461021 is 12016403.

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 1452025 + 29008996 = 1205^2 + 5386^2 .

It is a cyclic number.

It is not a de Polignac number, because 30461021 - 2² = 30461017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30461023) 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, 249620 + ... + 249741.

It is an arithmetic number, because the mean of its divisors is an integer number (7740111).

Almost surely, 2^30461021 is an apocalyptic number.

It is an amenable number.

30461021 is a deficient number, since it is larger than the sum of its proper divisors (499423).

30461021 is an equidigital number, since it uses as much as digits as its factorization.

30461021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499422.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 30461021 is about 5519.1503875144. The cubic root of 30461021 is about 312.3068323006.

Adding to 30461021 its reverse (12016403), we get a palindrome (42477424).

The spelling of 30461021 in words is "thirty million, four hundred sixty-one thousand, twenty-one".