122731505 has 16 divisors (see below), whose sum is σ = 161300160. Its totient is φ = 89093568.

The previous prime is 122731489. The next prime is 122731513. The reversal of 122731505 is 505137221.

It is a cyclic number.

It is not a de Polignac number, because 122731505 - 2⁴ = 122731489 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12167 + ... + 19836.

It is an arithmetic number, because the mean of its divisors is an integer number (10081260).

Almost surely, 2^122731505 is an apocalyptic number.

It is an amenable number.

122731505 is a deficient number, since it is larger than the sum of its proper divisors (38568655).

122731505 is a wasteful number, since it uses less digits than its factorization.

122731505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32080.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 122731505 is about 11078.4252039719. The cubic root of 122731505 is about 496.9568561264.

Adding to 122731505 its reverse (505137221), we get a palindrome (627868726).

The spelling of 122731505 in words is "one hundred twenty-two million, seven hundred thirty-one thousand, five hundred five".