30340421 has 4 divisors (see below), whose sum is σ = 30357612. Its totient is φ = 30323232.

The previous prime is 30340417. The next prime is 30340441. The reversal of 30340421 is 12404303.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12404303 = 193 ⋅64271.

It can be written as a sum of positive squares in 2 ways, for example, as 15602500 + 14737921 = 3950^2 + 3839^2 .

It is a cyclic number.

It is not a de Polignac number, because 30340421 - 2² = 30340417 is a prime.

It is a super-2 number, since 2×30340421² = 1841082292914482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30340421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30340411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5600 + ... + 9593.

It is an arithmetic number, because the mean of its divisors is an integer number (7589403).

Almost surely, 2^30340421 is an apocalyptic number.

It is an amenable number.

30340421 is a deficient number, since it is larger than the sum of its proper divisors (17191).

30340421 is a wasteful number, since it uses less digits than its factorization.

30340421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17190.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 30340421 is about 5508.2139573550. The cubic root of 30340421 is about 311.8941297872.

Adding to 30340421 its reverse (12404303), we get a palindrome (42744724).

The spelling of 30340421 in words is "thirty million, three hundred forty thousand, four hundred twenty-one".