Search a number
-
+
49857 = 316619
BaseRepresentation
bin1100001011000001
32112101120
430023001
53043412
61022453
7265233
oct141301
975346
1049857
1134505
1224a29
1319902
1414253
15eb8c
hexc2c1

49857 has 4 divisors (see below), whose sum is σ = 66480. Its totient is φ = 33236.

The previous prime is 49853. The next prime is 49871. The reversal of 49857 is 75894.

Added to its reverse (75894) it gives a triangular number (125751 = T501).

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.

It is a cyclic number.

It is not a de Polignac number, because 49857 - 22 = 49853 is a prime.

It is a D-number.

49857 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (49853) 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, 8307 + ... + 8312.

It is an arithmetic number, because the mean of its divisors is an integer number (16620).

249857 is an apocalyptic number.

It is an amenable number.

49857 is a deficient number, since it is larger than the sum of its proper divisors (16623).

49857 is a wasteful number, since it uses less digits than its factorization.

49857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16622.

The product of its digits is 10080, while the sum is 33.

The square root of 49857 is about 223.2868110749. The cubic root of 49857 is about 36.8051603507.

Adding to 49857 its reverse (75894), we get a triangular number (125751 = T501).

It can be divided in two parts, 498 and 57, that added together give a palindrome (555).

The spelling of 49857 in words is "forty-nine thousand, eight hundred fifty-seven".

Divisors: 1 3 16619 49857