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123404 = 2230851
BaseRepresentation
bin11110001000001100
320021021112
4132020030
512422104
62351152
71022531
oct361014
9207245
10123404
1184796
125b4b8
1344228
1432d88
152686e
hex1e20c

123404 has 6 divisors (see below), whose sum is σ = 215964. Its totient is φ = 61700.

The previous prime is 123401. The next prime is 123407. The reversal of 123404 is 404321.

It is an interprime number because it is at equal distance from previous prime (123401) and next prime (123407).

It is not an unprimeable number, because it can be changed into a prime (123401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15422 + ... + 15429.

It is an arithmetic number, because the mean of its divisors is an integer number (35994).

2123404 is an apocalyptic number.

It is an amenable number.

123404 is a deficient number, since it is larger than the sum of its proper divisors (92560).

123404 is a wasteful number, since it uses less digits than its factorization.

123404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30855 (or 30853 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 123404 is about 351.2890547683. The cubic root of 123404 is about 49.7862878437.

Adding to 123404 its reverse (404321), we get a palindrome (527725).

The spelling of 123404 in words is "one hundred twenty-three thousand, four hundred four", and thus it is an iban number.

Divisors: 1 2 4 30851 61702 123404