30742145 has 16 divisors (see below), whose sum is σ = 43994880. Its totient is φ = 20163264.

The previous prime is 30742141. The next prime is 30742177. The reversal of 30742145 is 54124703.

It is a cyclic number.

It is not a de Polignac number, because 30742145 - 2² = 30742141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30742141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18290 + ... + 19899.

It is an arithmetic number, because the mean of its divisors is an integer number (2749680).

Almost surely, 2^30742145 is an apocalyptic number.

30742145 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30742145 is a deficient number, since it is larger than the sum of its proper divisors (13252735).

30742145 is a wasteful number, since it uses less digits than its factorization.

30742145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38224.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 30742145 is about 5544.5599464701. The cubic root of 30742145 is about 313.2646490717.

Adding to 30742145 its reverse (54124703), we get a palindrome (84866848).

The spelling of 30742145 in words is "thirty million, seven hundred forty-two thousand, one hundred forty-five".