Search a number
-
+
154891 = 1114081
BaseRepresentation
bin100101110100001011
321212110201
4211310023
514424031
63153031
71213402
oct456413
9255421
10154891
11a6410
1275777
1355669
1440639
1530d61
hex25d0b

154891 has 4 divisors (see below), whose sum is σ = 168984. Its totient is φ = 140800.

The previous prime is 154883. The next prime is 154897. The reversal of 154891 is 198451.

It is a happy number.

154891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198451 = 1118041.

It is not a de Polignac number, because 154891 - 23 = 154883 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (154897) 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, 7030 + ... + 7051.

It is an arithmetic number, because the mean of its divisors is an integer number (42246).

2154891 is an apocalyptic number.

154891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

154891 is a deficient number, since it is larger than the sum of its proper divisors (14093).

154891 is a wasteful number, since it uses less digits than its factorization.

154891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14092.

The product of its digits is 1440, while the sum is 28.

The square root of 154891 is about 393.5619392167. The cubic root of 154891 is about 53.7042589041.

The spelling of 154891 in words is "one hundred fifty-four thousand, eight hundred ninety-one".

Divisors: 1 11 14081 154891