122500729 has 4 divisors (see below), whose sum is σ = 131923876. Its totient is φ = 113077584.

The previous prime is 122500711. The next prime is 122500787. The reversal of 122500729 is 927005221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 927005221 = 89 ⋅10415789.

It can be written as a sum of positive squares in 2 ways, for example, as 23040000 + 99460729 = 4800^2 + 9973^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122500729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122500697 and 122500706.

It is not an unprimeable number, because it can be changed into a prime (122500129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4711554 + ... + 4711579.

It is an arithmetic number, because the mean of its divisors is an integer number (32980969).

Almost surely, 2^122500729 is an apocalyptic number.

It is an amenable number.

122500729 is a deficient number, since it is larger than the sum of its proper divisors (9423147).

122500729 is an equidigital number, since it uses as much as digits as its factorization.

122500729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9423146.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 122500729 is about 11068.0047434034. The cubic root of 122500729 is about 496.6451793676.

It can be divided in two parts, 122500 and 729, that multiplied together give a square (89302500 = 9450²).

The spelling of 122500729 in words is "one hundred twenty-two million, five hundred thousand, seven hundred twenty-nine".