30026421 has 6 divisors (see below), whose sum is σ = 43371510. Its totient is φ = 20017608.

The previous prime is 30026417. The next prime is 30026443. The reversal of 30026421 is 12462003.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 28998225 + 1028196 = 5385^2 + 1014^2 .

It is not a de Polignac number, because 30026421 - 2² = 30026417 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30026394 and 30026403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30026621) 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 5 ways as a sum of consecutive naturals, for example, 1668126 + ... + 1668143.

It is an arithmetic number, because the mean of its divisors is an integer number (7228585).

Almost surely, 2^30026421 is an apocalyptic number.

It is an amenable number.

30026421 is a deficient number, since it is larger than the sum of its proper divisors (13345089).

30026421 is a wasteful number, since it uses less digits than its factorization.

30026421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3336275 (or 3336272 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 30026421 is about 5479.6369405281. The cubic root of 30026421 is about 310.8144418189.

Adding to 30026421 its reverse (12462003), we get a palindrome (42488424).

The spelling of 30026421 in words is "thirty million, twenty-six thousand, four hundred twenty-one".