123956745 has 32 divisors (see below), whose sum is σ = 221405184. Its totient is φ = 58699200.

The previous prime is 123956737. The next prime is 123956761. The reversal of 123956745 is 547659321.

It is not a de Polignac number, because 123956745 - 2³ = 123956737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123956697 and 123956706.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1641 + ... + 15830.

It is an arithmetic number, because the mean of its divisors is an integer number (6918912).

Almost surely, 2^123956745 is an apocalyptic number.

123956745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123956745 is a deficient number, since it is larger than the sum of its proper divisors (97448439).

123956745 is a wasteful number, since it uses less digits than its factorization.

123956745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17533.

The product of its digits is 226800, while the sum is 42.

The square root of 123956745 is about 11133.5863494204. The cubic root of 123956745 is about 498.6051054907.

The spelling of 123956745 in words is "one hundred twenty-three million, nine hundred fifty-six thousand, seven hundred forty-five".