30672121 has 2 divisors, whose sum is σ = 30672122. Its totient is φ = 30672120.

The previous prime is 30672101. The next prime is 30672127. The reversal of 30672121 is 12127603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18147600 + 12524521 = 4260^2 + 3539^2 .

It is a cyclic number.

It is not a de Polignac number, because 30672121 - 2⁹ = 30671609 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 30672092 and 30672101.

It is not a weakly prime, because it can be changed into another prime (30672127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15336060 + 15336061.

It is an arithmetic number, because the mean of its divisors is an integer number (15336061).

Almost surely, 2^30672121 is an apocalyptic number.

It is an amenable number.

30672121 is a deficient number, since it is larger than the sum of its proper divisors (1).

30672121 is an equidigital number, since it uses as much as digits as its factorization.

30672121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 30672121 is about 5538.2416884784. The cubic root of 30672121 is about 313.0266184020.

Adding to 30672121 its reverse (12127603), we get a palindrome (42799724).

It can be divided in two parts, 306 and 72121, that added together give a palindrome (72427).

The spelling of 30672121 in words is "thirty million, six hundred seventy-two thousand, one hundred twenty-one".