123145452 has 72 divisors (see below), whose sum is σ = 322585536. Its totient is φ = 39585024.

The previous prime is 123145439. The next prime is 123145487. The reversal of 123145452 is 254541321.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123018 + ... + 124014.

Almost surely, 2^123145452 is an apocalyptic number.

123145452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123145452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161292768).

123145452 is an abundant number, since it is smaller than the sum of its proper divisors (199440084).

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

123145452 is a wasteful number, since it uses less digits than its factorization.

123145452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127 (or 1122 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 123145452 is about 11097.0920515241. The cubic root of 123145452 is about 497.5149387365.

Adding to 123145452 its reverse (254541321), we get a palindrome (377686773).

It can be divided in two parts, 12314 and 5452, that added together give a triangular number (17766 = T₁₈₈).

The spelling of 123145452 in words is "one hundred twenty-three million, one hundred forty-five thousand, four hundred fifty-two".