30126409 has 2 divisors, whose sum is σ = 30126410. Its totient is φ = 30126408.

The previous prime is 30126391. The next prime is 30126449. The reversal of 30126409 is 90462103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24720784 + 5405625 = 4972^2 + 2325^2 .

It is a cyclic number.

It is not a de Polignac number, because 30126409 - 2⁵ = 30126377 is a prime.

It is a super-3 number, since 3×30126409³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (30126449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15063204 + 15063205.

It is an arithmetic number, because the mean of its divisors is an integer number (15063205).

Almost surely, 2^30126409 is an apocalyptic number.

It is an amenable number.

30126409 is a deficient number, since it is larger than the sum of its proper divisors (1).

30126409 is an equidigital number, since it uses as much as digits as its factorization.

30126409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 30126409 is about 5488.7529549070. The cubic root of 30126409 is about 311.1590636639.

The spelling of 30126409 in words is "thirty million, one hundred twenty-six thousand, four hundred nine".