30123105 has 16 divisors (see below), whose sum is σ = 48295104. Its totient is φ = 16032960.

The previous prime is 30123097. The next prime is 30123109. The reversal of 30123105 is 50132103.

It is a happy number.

It is not a de Polignac number, because 30123105 - 2³ = 30123097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (30123109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6807 + ... + 10323.

It is an arithmetic number, because the mean of its divisors is an integer number (3018444).

Almost surely, 2^30123105 is an apocalyptic number.

It is an amenable number.

30123105 is a deficient number, since it is larger than the sum of its proper divisors (18171999).

30123105 is a wasteful number, since it uses less digits than its factorization.

30123105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4096.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 30123105 is about 5488.4519675406. The cubic root of 30123105 is about 311.1476881834.

Adding to 30123105 its reverse (50132103), we get a palindrome (80255208).

The spelling of 30123105 in words is "thirty million, one hundred twenty-three thousand, one hundred five".