30007421 has 6 divisors (see below), whose sum is σ = 30723390. Its totient is φ = 29307768.

The previous prime is 30007399. The next prime is 30007423. The reversal of 30007421 is 12470003.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 29822521 + 184900 = 5461^2 + 430^2 .

It is not a de Polignac number, because 30007421 - 2¹⁴ = 29991037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30007421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30007423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6266 + ... + 9963.

It is an arithmetic number, because the mean of its divisors is an integer number (5120565).

Almost surely, 2^30007421 is an apocalyptic number.

It is an amenable number.

30007421 is a deficient number, since it is larger than the sum of its proper divisors (715969).

30007421 is an equidigital number, since it uses as much as digits as its factorization.

30007421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16315 (or 16272 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 30007421 is about 5477.9029746793. The cubic root of 30007421 is about 310.7488693413.

Adding to 30007421 its reverse (12470003), we get a palindrome (42477424).

The spelling of 30007421 in words is "thirty million, seven thousand, four hundred twenty-one".