123740845 has 8 divisors (see below), whose sum is σ = 149348376. Its totient is φ = 98419776.

The previous prime is 123740791. The next prime is 123740861. The reversal of 123740845 is 548047321.

It can be written as a sum of positive squares in 4 ways, for example, as 78340201 + 45400644 = 8851^2 + 6738^2 .

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 123740845 - 2⁹ = 123740333 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123740845.

It is a congruent 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, 70662 + ... + 72391.

It is an arithmetic number, because the mean of its divisors is an integer number (18668547).

Almost surely, 2^123740845 is an apocalyptic number.

It is an amenable number.

123740845 is a deficient number, since it is larger than the sum of its proper divisors (25607531).

123740845 is a wasteful number, since it uses less digits than its factorization.

123740845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143231.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 123740845 is about 11123.8862363834. The cubic root of 123740845 is about 498.3154576746.

The spelling of 123740845 in words is "one hundred twenty-three million, seven hundred forty thousand, eight hundred forty-five".