30412561 has 4 divisors (see below), whose sum is σ = 31461300. Its totient is φ = 29363824.

The previous prime is 30412549. The next prime is 30412579. The reversal of 30412561 is 16521403.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24800400 + 5612161 = 4980^2 + 2369^2 .

It is a cyclic number.

It is not a de Polignac number, because 30412561 - 2¹³ = 30404369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30418561) 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, 524326 + ... + 524383.

It is an arithmetic number, because the mean of its divisors is an integer number (7865325).

Almost surely, 2^30412561 is an apocalyptic number.

It is an amenable number.

30412561 is a deficient number, since it is larger than the sum of its proper divisors (1048739).

30412561 is a wasteful number, since it uses less digits than its factorization.

30412561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048738.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 30412561 is about 5514.7584715924. The cubic root of 30412561 is about 312.1411295829.

Adding to 30412561 its reverse (16521403), we get a palindrome (46933964).

The spelling of 30412561 in words is "thirty million, four hundred twelve thousand, five hundred sixty-one".