122905845 has 12 divisors (see below), whose sum is σ = 213036876. Its totient is φ = 65549760.

The previous prime is 122905843. The next prime is 122905847. The reversal of 122905845 is 548509221.

It is an interprime number because it is at equal distance from previous prime (122905843) and next prime (122905847).

It can be written as a sum of positive squares in 2 ways, for example, as 48566961 + 74338884 = 6969^2 + 8622^2 .

It is not a de Polignac number, because 122905845 - 2¹ = 122905843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122905843) 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, 1365576 + ... + 1365665.

It is an arithmetic number, because the mean of its divisors is an integer number (17753073).

Almost surely, 2^122905845 is an apocalyptic number.

122905845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

122905845 is a deficient number, since it is larger than the sum of its proper divisors (90131031).

122905845 is a wasteful number, since it uses less digits than its factorization.

122905845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2731252 (or 2731249 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 122905845 is about 11086.2908585333. The cubic root of 122905845 is about 497.1920537280.

The spelling of 122905845 in words is "one hundred twenty-two million, nine hundred five thousand, eight hundred forty-five".