123381545 has 16 divisors (see below), whose sum is σ = 176567040. Its totient is φ = 80925504.

The previous prime is 123381541. The next prime is 123381547. The reversal of 123381545 is 545183321.

It is a cyclic number.

It is not a de Polignac number, because 123381545 - 2² = 123381541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123381541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75830 + ... + 77439.

It is an arithmetic number, because the mean of its divisors is an integer number (11035440).

Almost surely, 2^123381545 is an apocalyptic number.

It is an amenable number.

123381545 is a deficient number, since it is larger than the sum of its proper divisors (53185495).

123381545 is a wasteful number, since it uses less digits than its factorization.

123381545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153304.

The product of its digits is 14400, while the sum is 32.

The square root of 123381545 is about 11107.7245644641. The cubic root of 123381545 is about 497.8326790135.

The spelling of 123381545 in words is "one hundred twenty-three million, three hundred eighty-one thousand, five hundred forty-five".