30491245 has 4 divisors (see below), whose sum is σ = 36589500. Its totient is φ = 24392992.

The previous prime is 30491239. The next prime is 30491273. The reversal of 30491245 is 54219403.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23532201 + 6959044 = 4851^2 + 2638^2 .

It is a cyclic number.

It is not a de Polignac number, because 30491245 - 2⁵ = 30491213 is a prime.

It is a nialpdrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3049120 + ... + 3049129.

It is an arithmetic number, because the mean of its divisors is an integer number (9147375).

Almost surely, 2^30491245 is an apocalyptic number.

It is an amenable number.

30491245 is a deficient number, since it is larger than the sum of its proper divisors (6098255).

30491245 is an equidigital number, since it uses as much as digits as its factorization.

30491245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6098254.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 30491245 is about 5521.8878112472. The cubic root of 30491245 is about 312.4100904012.

The spelling of 30491245 in words is "thirty million, four hundred ninety-one thousand, two hundred forty-five".