123531001 has 16 divisors (see below), whose sum is σ = 139903488. Its totient is φ = 108057600.

The previous prime is 123530971. The next prime is 123531011. The reversal of 123531001 is 100135321.

It is a cyclic number.

It is not a de Polignac number, because 123531001 - 2⁹ = 123530489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123531011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64875 + ... + 66751.

It is an arithmetic number, because the mean of its divisors is an integer number (8743968).

Almost surely, 2^123531001 is an apocalyptic number.

123531001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123531001 is a deficient number, since it is larger than the sum of its proper divisors (16372487).

123531001 is a wasteful number, since it uses less digits than its factorization.

123531001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 123531001 is about 11114.4500988578. The cubic root of 123531001 is about 498.0336114366.

Adding to 123531001 its reverse (100135321), we get a palindrome (223666322).

The spelling of 123531001 in words is "one hundred twenty-three million, five hundred thirty-one thousand, one".