123132145 has 8 divisors (see below), whose sum is σ = 149066856. Its totient is φ = 97633536.

The previous prime is 123132137. The next prime is 123132157. The reversal of 123132145 is 541231321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7203856 + 115928289 = 2684^2 + 10767^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123132145 - 2³ = 123132137 is a prime.

It is a super-3 number, since 3×123132145³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108402 + ... + 109531.

It is an arithmetic number, because the mean of its divisors is an integer number (18633357).

Almost surely, 2^123132145 is an apocalyptic number.

It is an amenable number.

123132145 is a deficient number, since it is larger than the sum of its proper divisors (25934711).

123132145 is a wasteful number, since it uses less digits than its factorization.

123132145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218051.

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

The square root of 123132145 is about 11096.4924638374. The cubic root of 123132145 is about 497.4970177342.

Adding to 123132145 its reverse (541231321), we get a palindrome (664363466).

The spelling of 123132145 in words is "one hundred twenty-three million, one hundred thirty-two thousand, one hundred forty-five".