30145705 has 8 divisors (see below), whose sum is σ = 36263304. Its totient is φ = 24057600.

The previous prime is 30145699. The next prime is 30145729. The reversal of 30145705 is 50754103.

It can be written as a sum of positive squares in 4 ways, for example, as 4064256 + 26081449 = 2016^2 + 5107^2 .

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

It is not a de Polignac number, because 30145705 - 2⁵ = 30145673 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 30145705.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5056 + ... + 9265.

It is an arithmetic number, because the mean of its divisors is an integer number (4532913).

Almost surely, 2^30145705 is an apocalyptic number.

It is an amenable number.

30145705 is a deficient number, since it is larger than the sum of its proper divisors (6117599).

30145705 is a wasteful number, since it uses less digits than its factorization.

30145705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14747.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 30145705 is about 5490.5104498580. The cubic root of 30145705 is about 311.2254820663.

Adding to 30145705 its reverse (50754103), we get a palindrome (80899808).

The spelling of 30145705 in words is "thirty million, one hundred forty-five thousand, seven hundred five".