122805131 has 4 divisors (see below), whose sum is σ = 123319200. Its totient is φ = 122291064.

The previous prime is 122805121. The next prime is 122805157. The reversal of 122805131 is 131508221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131508221 = 13 ⋅10116017.

It is a cyclic number.

It is not a de Polignac number, because 122805131 - 2¹⁴ = 122788747 is a prime.

It is a super-2 number, since 2×122805131² = 30162200399854322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122805097 and 122805106.

It is not an unprimeable number, because it can be changed into a prime (122805101) 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, 256676 + ... + 257153.

It is an arithmetic number, because the mean of its divisors is an integer number (30829800).

Almost surely, 2^122805131 is an apocalyptic number.

122805131 is a deficient number, since it is larger than the sum of its proper divisors (514069).

122805131 is an equidigital number, since it uses as much as digits as its factorization.

122805131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514068.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 122805131 is about 11081.7476509800. The cubic root of 122805131 is about 497.0562102175.

The spelling of 122805131 in words is "one hundred twenty-two million, eight hundred five thousand, one hundred thirty-one".