30671421 has 16 divisors (see below), whose sum is σ = 44815680. Its totient is φ = 18504320.

The previous prime is 30671419. The next prime is 30671429. The reversal of 30671421 is 12417603.

It is a cyclic number.

It is not a de Polignac number, because 30671421 - 2¹ = 30671419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30671391 and 30671400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30671429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5695 + ... + 9683.

It is an arithmetic number, because the mean of its divisors is an integer number (2800980).

Almost surely, 2^30671421 is an apocalyptic number.

It is an amenable number.

30671421 is a deficient number, since it is larger than the sum of its proper divisors (14144259).

30671421 is a wasteful number, since it uses less digits than its factorization.

30671421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4236.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 30671421 is about 5538.1784911648. The cubic root of 30671421 is about 313.0242370831.

The spelling of 30671421 in words is "thirty million, six hundred seventy-one thousand, four hundred twenty-one".