123453121 has 16 divisors (see below), whose sum is σ = 142248960. Its totient is φ = 106039120.

The previous prime is 123453119. The next prime is 123453151. The reversal of 123453121 is 121354321.

It is a happy number.

It is not a de Polignac number, because 123453121 - 2¹ = 123453119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123453092 and 123453101.

It is not an unprimeable number, because it can be changed into a prime (123453151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18060 + ... + 23938.

It is an arithmetic number, because the mean of its divisors is an integer number (8890560).

Almost surely, 2^123453121 is an apocalyptic number.

123453121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123453121 is a deficient number, since it is larger than the sum of its proper divisors (18795839).

123453121 is a wasteful number, since it uses less digits than its factorization.

123453121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5996.

The product of its digits is 720, while the sum is 22.

The square root of 123453121 is about 11110.9459993288. The cubic root of 123453121 is about 497.9289278315.

The spelling of 123453121 in words is "one hundred twenty-three million, four hundred fifty-three thousand, one hundred twenty-one".