30681241 has 4 divisors (see below), whose sum is σ = 32015232. Its totient is φ = 29347252.

The previous prime is 30681221. The next prime is 30681247. The reversal of 30681241 is 14218603.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14218603 = 7 ⋅2031229.

It is a cyclic number.

It is not a de Polignac number, because 30681241 - 2¹⁵ = 30648473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30681247) 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 3 ways as a sum of consecutive naturals, for example, 666961 + ... + 667006.

It is an arithmetic number, because the mean of its divisors is an integer number (8003808).

Almost surely, 2^30681241 is an apocalyptic number.

It is an amenable number.

30681241 is a deficient number, since it is larger than the sum of its proper divisors (1333991).

30681241 is a wasteful number, since it uses less digits than its factorization.

30681241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333990.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 30681241 is about 5539.0649932999. The cubic root of 30681241 is about 313.0576402742.

Adding to 30681241 its reverse (14218603), we get a palindrome (44899844).

The spelling of 30681241 in words is "thirty million, six hundred eighty-one thousand, two hundred forty-one".