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30061 = 231307
BaseRepresentation
bin111010101101101
31112020101
413111231
51430221
6351101
7153433
oct72555
945211
1030061
1120649
1215491
13108b5
14ad53
158d91
hex756d

30061 has 4 divisors (see below), whose sum is σ = 31392. Its totient is φ = 28732.

The previous prime is 30059. The next prime is 30071. The reversal of 30061 is 16003.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16003 = 131231.

It is a cyclic number.

It is not a de Polignac number, because 30061 - 21 = 30059 is a prime.

It is a Duffinian number.

30061 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631 + ... + 676.

It is an arithmetic number, because the mean of its divisors is an integer number (7848).

230061 is an apocalyptic number.

It is an amenable number.

30061 is a deficient number, since it is larger than the sum of its proper divisors (1331).

30061 is a wasteful number, since it uses less digits than its factorization.

30061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 30061 is about 173.3810831665. The cubic root of 30061 is about 31.0933709330.

Adding to 30061 its reverse (16003), we get a palindrome (46064).

It can be divided in two parts, 300 and 61, that added together give a square (361 = 192).

The spelling of 30061 in words is "thirty thousand, sixty-one".

Divisors: 1 23 1307 30061