30005249 has 4 divisors (see below), whose sum is σ = 30071364. Its totient is φ = 29939136.

The previous prime is 30005243. The next prime is 30005257. The reversal of 30005249 is 94250003.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94250003 = 509 ⋅185167.

It can be written as a sum of positive squares in 2 ways, for example, as 28430224 + 1575025 = 5332^2 + 1255^2 .

It is a cyclic number.

It is not a de Polignac number, because 30005249 - 2¹⁶ = 29939713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30005243) 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, 32372 + ... + 33285.

It is an arithmetic number, because the mean of its divisors is an integer number (7517841).

Almost surely, 2^30005249 is an apocalyptic number.

It is an amenable number.

30005249 is a deficient number, since it is larger than the sum of its proper divisors (66115).

30005249 is an equidigital number, since it uses as much as digits as its factorization.

30005249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66114.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 30005249 is about 5477.7047200447. The cubic root of 30005249 is about 310.7413716090.

The spelling of 30005249 in words is "thirty million, five thousand, two hundred forty-nine".