30421005 has 16 divisors (see below), whose sum is σ = 49473024. Its totient is φ = 15958080.

The previous prime is 30421003. The next prime is 30421009. The reversal of 30421005 is 50012403.

It is not a de Polignac number, because 30421005 - 2¹ = 30421003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30421003) 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, 15709 + ... + 17538.

It is an arithmetic number, because the mean of its divisors is an integer number (3092064).

Almost surely, 2^30421005 is an apocalyptic number.

It is an amenable number.

30421005 is a deficient number, since it is larger than the sum of its proper divisors (19052019).

30421005 is a wasteful number, since it uses less digits than its factorization.

30421005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33316.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 30421005 is about 5515.5240004917. The cubic root of 30421005 is about 312.1700154085.

Adding to 30421005 its reverse (50012403), we get a palindrome (80433408).

The spelling of 30421005 in words is "thirty million, four hundred twenty-one thousand, five".