30405245 has 8 divisors (see below), whose sum is σ = 39293016. Its totient is φ = 22453056.

The previous prime is 30405239. The next prime is 30405247. The reversal of 30405245 is 54250403.

It can be written as a sum of positive squares in 4 ways, for example, as 177241 + 30228004 = 421^2 + 5498^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30405245 - 2¹² = 30401149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30405245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30405247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233822 + ... + 233951.

It is an arithmetic number, because the mean of its divisors is an integer number (4911627).

Almost surely, 2^30405245 is an apocalyptic number.

It is an amenable number.

30405245 is a deficient number, since it is larger than the sum of its proper divisors (8887771).

30405245 is a wasteful number, since it uses less digits than its factorization.

30405245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467791.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 30405245 is about 5514.0951206884. The cubic root of 30405245 is about 312.1160981752.

Adding to 30405245 its reverse (54250403), we get a palindrome (84655648).

The spelling of 30405245 in words is "thirty million, four hundred five thousand, two hundred forty-five".