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30461 = 83367
BaseRepresentation
bin111011011111101
31112210012
413123331
51433321
6353005
7154544
oct73375
945705
1030461
1120982
1215765
1310b32
14b15b
15905b
hex76fd

30461 has 4 divisors (see below), whose sum is σ = 30912. Its totient is φ = 30012.

The previous prime is 30449. The next prime is 30467. The reversal of 30461 is 16403.

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: 16403 = 47349.

It is a cyclic number.

It is not a de Polignac number, because 30461 - 210 = 29437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30467) 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, 101 + ... + 266.

It is an arithmetic number, because the mean of its divisors is an integer number (7728).

230461 is an apocalyptic number.

It is an amenable number.

30461 is a deficient number, since it is larger than the sum of its proper divisors (451).

30461 is an equidigital number, since it uses as much as digits as its factorization.

30461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 30461 is about 174.5307995742. The cubic root of 30461 is about 31.2306760532.

Adding to 30461 its reverse (16403), we get a palindrome (46864).

The spelling of 30461 in words is "thirty thousand, four hundred sixty-one".

Divisors: 1 83 367 30461