123532155 has 16 divisors (see below), whose sum is σ = 219612960. Its totient is φ = 65883744.

The previous prime is 123532151. The next prime is 123532177. The reversal of 123532155 is 551235321.

It is a happy number.

123532155 is a `hidden beast` number, since 123 + 532 + 1 + 5 + 5 = 666.

It is not a de Polignac number, because 123532155 - 2² = 123532151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (123532151) 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, 457392 + ... + 457661.

It is an arithmetic number, because the mean of its divisors is an integer number (13725810).

Almost surely, 2^123532155 is an apocalyptic number.

123532155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123532155 is a deficient number, since it is larger than the sum of its proper divisors (96080805).

123532155 is an equidigital number, since it uses as much as digits as its factorization.

123532155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915067 (or 915061 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 123532155 is about 11114.5020131358. The cubic root of 123532155 is about 498.0351622726.

Adding to 123532155 its reverse (551235321), we get a palindrome (674767476).

The spelling of 123532155 in words is "one hundred twenty-three million, five hundred thirty-two thousand, one hundred fifty-five".