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122155 = 5112221
BaseRepresentation
bin11101110100101011
320012120021
4131310223
512402110
62341311
71016065
oct356453
9205507
10122155
1183860
125a837
13437a7
1432735
15262da
hex1dd2b

122155 has 8 divisors (see below), whose sum is σ = 159984. Its totient is φ = 88800.

The previous prime is 122149. The next prime is 122167. The reversal of 122155 is 551221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 122155 - 23 = 122147 is a prime.

It is a super-3 number, since 3×1221553 = 5468333570621625, which contains 333 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1056 + ... + 1165.

It is an arithmetic number, because the mean of its divisors is an integer number (19998).

2122155 is an apocalyptic number.

122155 is a deficient number, since it is larger than the sum of its proper divisors (37829).

122155 is a wasteful number, since it uses less digits than its factorization.

122155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2237.

The product of its digits is 100, while the sum is 16.

The square root of 122155 is about 349.5067953560. The cubic root of 122155 is about 49.6177518404.

Adding to 122155 its reverse (551221), we get a palindrome (673376).

It can be divided in two parts, 12215 and 5, that multiplied together give a triangular number (61075 = T349).

The spelling of 122155 in words is "one hundred twenty-two thousand, one hundred fifty-five".

Divisors: 1 5 11 55 2221 11105 24431 122155