123035531 has 4 divisors (see below), whose sum is σ = 123654000. Its totient is φ = 122417064.

The previous prime is 123035503. The next prime is 123035537. The reversal of 123035531 is 135530321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123035531 - 2¹⁰ = 123034507 is a prime.

It is a super-2 number, since 2×123035531² = 30275483776903922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123035497 and 123035506.

It is not an unprimeable number, because it can be changed into a prime (123035537) 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 3 ways as a sum of consecutive naturals, for example, 308936 + ... + 309333.

It is an arithmetic number, because the mean of its divisors is an integer number (30913500).

Almost surely, 2^123035531 is an apocalyptic number.

123035531 is a deficient number, since it is larger than the sum of its proper divisors (618469).

123035531 is an equidigital number, since it uses as much as digits as its factorization.

123035531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618468.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 123035531 is about 11092.1382519332. The cubic root of 123035531 is about 497.3668655480.

Adding to 123035531 its reverse (135530321), we get a palindrome (258565852).

The spelling of 123035531 in words is "one hundred twenty-three million, thirty-five thousand, five hundred thirty-one".