30645245 has 8 divisors (see below), whose sum is σ = 37671480. Its totient is φ = 23918080.

The previous prime is 30645239. The next prime is 30645253. The reversal of 30645245 is 54254603.

It can be written as a sum of positive squares in 4 ways, for example, as 811801 + 29833444 = 901^2 + 5462^2 .

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

It is not a de Polignac number, because 30645245 - 2¹⁰ = 30644221 is a prime.

It is a super-2 number, since 2×30645245² = 1878262082220050, which contains 22 as substring.

It is a congruent number.

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, 74540 + ... + 74949.

It is an arithmetic number, because the mean of its divisors is an integer number (4708935).

Almost surely, 2^30645245 is an apocalyptic number.

It is an amenable number.

30645245 is a deficient number, since it is larger than the sum of its proper divisors (7026235).

30645245 is a wasteful number, since it uses less digits than its factorization.

30645245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149535.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 30645245 is about 5535.8147548486. The cubic root of 30645245 is about 312.9351633439.

Adding to 30645245 its reverse (54254603), we get a palindrome (84899848).

The spelling of 30645245 in words is "thirty million, six hundred forty-five thousand, two hundred forty-five".