123780745 has 8 divisors (see below), whose sum is σ = 162040320. Its totient is φ = 90022320.

The previous prime is 123780739. The next prime is 123780749. The reversal of 123780745 is 547087321.

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

It is not a de Polignac number, because 123780745 - 2¹⁵ = 123747977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123780749) 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, 1125225 + ... + 1125334.

It is an arithmetic number, because the mean of its divisors is an integer number (20255040).

Almost surely, 2^123780745 is an apocalyptic number.

It is an amenable number.

123780745 is a deficient number, since it is larger than the sum of its proper divisors (38259575).

123780745 is a wasteful number, since it uses less digits than its factorization.

123780745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2250575.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 123780745 is about 11125.6795298085. The cubic root of 123780745 is about 498.3690122092.

The spelling of 123780745 in words is "one hundred twenty-three million, seven hundred eighty thousand, seven hundred forty-five".