123965145 has 24 divisors (see below), whose sum is σ = 218931336. Its totient is φ = 64866048.

The previous prime is 123965143. The next prime is 123965161. The reversal of 123965145 is 541569321.

It can be written as a sum of positive squares in 4 ways, for example, as 37307664 + 86657481 = 6108^2 + 9309^2 .

It is not a de Polignac number, because 123965145 - 2¹ = 123965143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123965143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23604 + ... + 28373.

It is an arithmetic number, because the mean of its divisors is an integer number (9122139).

Almost surely, 2^123965145 is an apocalyptic number.

123965145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123965145 is a deficient number, since it is larger than the sum of its proper divisors (94966191).

123965145 is a wasteful number, since it uses less digits than its factorization.

123965145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52041 (or 52038 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 123965145 is about 11133.9635799656. The cubic root of 123965145 is about 498.6163679901.

The spelling of 123965145 in words is "one hundred twenty-three million, nine hundred sixty-five thousand, one hundred forty-five".