122709861 has 12 divisors (see below), whose sum is σ = 179676588. Its totient is φ = 80685504.

The previous prime is 122709841. The next prime is 122709869. The reversal of 122709861 is 168907221.

It can be written as a sum of positive squares in 2 ways, for example, as 23328900 + 99380961 = 4830^2 + 9969^2 .

It is not a de Polignac number, because 122709861 - 2¹⁰ = 122708837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122709869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92730 + ... + 94043.

It is an arithmetic number, because the mean of its divisors is an integer number (14973049).

Almost surely, 2^122709861 is an apocalyptic number.

It is an amenable number.

122709861 is a deficient number, since it is larger than the sum of its proper divisors (56966727).

122709861 is a wasteful number, since it uses less digits than its factorization.

122709861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186852 (or 186849 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 122709861 is about 11077.4483072592. The cubic root of 122709861 is about 496.9276412247.

The spelling of 122709861 in words is "one hundred twenty-two million, seven hundred nine thousand, eight hundred sixty-one".