123032406 has 16 divisors (see below), whose sum is σ = 281217024. Its totient is φ = 35152104.

The previous prime is 123032401. The next prime is 123032491. The reversal of 123032406 is 604230321.

It is a happy number.

It is a super-2 number, since 2×123032406² = 30273945852297672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123032401) 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, 1464630 + ... + 1464713.

It is an arithmetic number, because the mean of its divisors is an integer number (17576064).

Almost surely, 2^123032406 is an apocalyptic number.

123032406 is an abundant number, since it is smaller than the sum of its proper divisors (158184618).

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

123032406 is a wasteful number, since it uses less digits than its factorization.

123032406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2929355.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 123032406 is about 11091.9973855028. The cubic root of 123032406 is about 497.3626546110.

Adding to 123032406 its reverse (604230321), we get a palindrome (727262727).

The spelling of 123032406 in words is "one hundred twenty-three million, thirty-two thousand, four hundred six".