123248945 has 8 divisors (see below), whose sum is σ = 148545960. Its totient is φ = 98167680.

The previous prime is 123248933. The next prime is 123248947. The reversal of 123248945 is 549842321.

It can be written as a sum of positive squares in 4 ways, for example, as 21077281 + 102171664 = 4591^2 + 10108^2 .

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

It is not a de Polignac number, because 123248945 - 2¹⁰ = 123247921 is a prime.

It is a super-2 number, since 2×123248945² = 30380604887226050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123248899 and 123248908.

It is not an unprimeable number, because it can be changed into a prime (123248947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52676 + ... + 54965.

It is an arithmetic number, because the mean of its divisors is an integer number (18568245).

Almost surely, 2^123248945 is an apocalyptic number.

It is an amenable number.

123248945 is a deficient number, since it is larger than the sum of its proper divisors (25297015).

123248945 is a wasteful number, since it uses less digits than its factorization.

123248945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107875.

The product of its digits is 69120, while the sum is 38.

The square root of 123248945 is about 11101.7541406752. The cubic root of 123248945 is about 497.6542723331.

The spelling of 123248945 in words is "one hundred twenty-three million, two hundred forty-eight thousand, nine hundred forty-five".