122407681 has 4 divisors (see below), whose sum is σ = 133535664. Its totient is φ = 111279700.

The previous prime is 122407651. The next prime is 122407711. The reversal of 122407681 is 186704221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (122407651) and next prime (122407711).

It is a cyclic number.

It is not a de Polignac number, because 122407681 - 2⁹ = 122407169 is a prime.

It is a super-3 number, since 3×122407681³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122407601) 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, 5563975 + ... + 5563996.

It is an arithmetic number, because the mean of its divisors is an integer number (33383916).

Almost surely, 2^122407681 is an apocalyptic number.

122407681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122407681 is a deficient number, since it is larger than the sum of its proper divisors (11127983).

122407681 is a wasteful number, since it uses less digits than its factorization.

122407681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11127982.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 122407681 is about 11063.8004772320. The cubic root of 122407681 is about 496.5194017597.

The spelling of 122407681 in words is "one hundred twenty-two million, four hundred seven thousand, six hundred eighty-one".