122736731 has 4 divisors (see below), whose sum is σ = 132178032. Its totient is φ = 113295432.

The previous prime is 122736727. The next prime is 122736847. The reversal of 122736731 is 137637221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137637221 = 23 ⋅5984227.

It is a cyclic number.

It is not a de Polignac number, because 122736731 - 2² = 122736727 is a prime.

It is a super-2 number, since 2×122736731² = 30128610273132722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122736701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4720631 + ... + 4720656.

It is an arithmetic number, because the mean of its divisors is an integer number (33044508).

Almost surely, 2^122736731 is an apocalyptic number.

122736731 is a deficient number, since it is larger than the sum of its proper divisors (9441301).

122736731 is an equidigital number, since it uses as much as digits as its factorization.

122736731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9441300.

The product of its digits is 10584, while the sum is 32.

The square root of 122736731 is about 11078.6610653093. The cubic root of 122736731 is about 496.9639096254.

The spelling of 122736731 in words is "one hundred twenty-two million, seven hundred thirty-six thousand, seven hundred thirty-one".