30121057 has 8 divisors (see below), whose sum is σ = 31235840. Its totient is φ = 29015280.

The previous prime is 30121051. The next prime is 30121073. The reversal of 30121057 is 75012103.

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

It is a cyclic number.

It is not a de Polignac number, because 30121057 - 2¹⁹ = 29596769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30121051) 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 7 ways as a sum of consecutive naturals, for example, 4978 + ... + 9220.

It is an arithmetic number, because the mean of its divisors is an integer number (3904480).

Almost surely, 2^30121057 is an apocalyptic number.

It is an amenable number.

30121057 is a deficient number, since it is larger than the sum of its proper divisors (1114783).

30121057 is a wasteful number, since it uses less digits than its factorization.

30121057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4503.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 30121057 is about 5488.2653908134. The cubic root of 30121057 is about 311.1406366206.

The spelling of 30121057 in words is "thirty million, one hundred twenty-one thousand, fifty-seven".