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30127 = 47641
BaseRepresentation
bin111010110101111
31112022211
413112233
51431002
6351251
7153556
oct72657
945284
1030127
11206a9
1215527
1310936
14ad9d
158dd7
hex75af

30127 has 4 divisors (see below), whose sum is σ = 30816. Its totient is φ = 29440.

The previous prime is 30119. The next prime is 30133. The reversal of 30127 is 72103.

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

It is a cyclic number.

It is not a de Polignac number, because 30127 - 23 = 30119 is a prime.

It is a super-2 number, since 2×301272 = 1815272258, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30137) 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 3 ways as a sum of consecutive naturals, for example, 274 + ... + 367.

It is an arithmetic number, because the mean of its divisors is an integer number (7704).

230127 is an apocalyptic number.

30127 is a deficient number, since it is larger than the sum of its proper divisors (689).

30127 is an equidigital number, since it uses as much as digits as its factorization.

30127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688.

The product of its (nonzero) digits is 42, while the sum is 13.

The square root of 30127 is about 173.5713109935. The cubic root of 30127 is about 31.1161098355.

The spelling of 30127 in words is "thirty thousand, one hundred twenty-seven".

Divisors: 1 47 641 30127