123402 has 16 divisors (see below), whose sum is σ = 250272. Its totient is φ = 40560.

The previous prime is 123401. The next prime is 123407. The reversal of 123402 is 204321.

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 in 7 ways as a sum of consecutive naturals, for example, 708 + ... + 864.

It is an arithmetic number, because the mean of its divisors is an integer number (15642).

2¹²³⁴⁰² is an apocalyptic number.

123402 is an abundant number, since it is smaller than the sum of its proper divisors (126870).

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

123402 is a wasteful number, since it uses less digits than its factorization.

123402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 123402 is about 351.2862080982. The cubic root of 123402 is about 49.7860188813.

Adding to 123402 its reverse (204321), we get a palindrome (327723).

It can be divided in two parts, 123 and 402, that added together give a palindrome (525).

The spelling of 123402 in words is "one hundred twenty-three thousand, four hundred two", and thus it is an iban number.