122791285 has 4 divisors (see below), whose sum is σ = 147349548. Its totient is φ = 98233024.

The previous prime is 122791267. The next prime is 122791297. The reversal of 122791285 is 582197221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 582197221 = 19 ⋅30641959.

It can be written as a sum of positive squares in 2 ways, for example, as 86285521 + 36505764 = 9289^2 + 6042^2 .

It is a cyclic number.

It is not a de Polignac number, because 122791285 - 2²³ = 114402677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12279124 + ... + 12279133.

It is an arithmetic number, because the mean of its divisors is an integer number (36837387).

Almost surely, 2^122791285 is an apocalyptic number.

It is an amenable number.

122791285 is a deficient number, since it is larger than the sum of its proper divisors (24558263).

122791285 is an equidigital number, since it uses as much as digits as its factorization.

122791285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24558262.

The product of its digits is 20160, while the sum is 37.

The square root of 122791285 is about 11081.1229124128. The cubic root of 122791285 is about 497.0375288620.

The spelling of 122791285 in words is "one hundred twenty-two million, seven hundred ninety-one thousand, two hundred eighty-five".