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155406 = 2359439
BaseRepresentation
bin100101111100001110
321220011210
4211330032
514433111
63155250
71215036
oct457416
9256153
10155406
11a6839
1275b26
1355974
14408c6
15310a6
hex25f0e

155406 has 16 divisors (see below), whose sum is σ = 316800. Its totient is φ = 50808.

The previous prime is 155399. The next prime is 155413. The reversal of 155406 is 604551.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (155399) and next prime (155413).

It is a congruent number.

It is an unprimeable number.

155406 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135 + ... + 573.

It is an arithmetic number, because the mean of its divisors is an integer number (19800).

2155406 is an apocalyptic number.

155406 is an abundant number, since it is smaller than the sum of its proper divisors (161394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155406 is a wasteful number, since it uses less digits than its factorization.

155406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 155406 is about 394.2156770094. The cubic root of 155406 is about 53.7637138254.

Adding to 155406 its reverse (604551), we get a palindrome (759957).

It can be divided in two parts, 155 and 406, that added together give a triangular number (561 = T33).

The spelling of 155406 in words is "one hundred fifty-five thousand, four hundred six".

Divisors: 1 2 3 6 59 118 177 354 439 878 1317 2634 25901 51802 77703 155406