402123 has 8 divisors (see below), whose sum is σ = 539136. Its totient is φ = 266600.

The previous prime is 402107. The next prime is 402131. The reversal of 402123 is 321204.

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

It is a cyclic number.

It is not a de Polignac number, because 402123 - 2⁴ = 402107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 402099 and 402108.

It is not an unprimeable number, because it can be changed into a prime (402133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 718 + ... + 1148.

It is an arithmetic number, because the mean of its divisors is an integer number (67392).

2⁴⁰²¹²³ is an apocalyptic number.

402123 is a deficient number, since it is larger than the sum of its proper divisors (137013).

402123 is a wasteful number, since it uses less digits than its factorization.

402123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745.

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

The square root of 402123 is about 634.1316897932. The cubic root of 402123 is about 73.8107533482.

Adding to 402123 its reverse (321204), we get a palindrome (723327).

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

The spelling of 402123 in words is "four hundred two thousand, one hundred twenty-three", and thus it is an iban number.