122131945 has 16 divisors (see below), whose sum is σ = 158758992. Its totient is φ = 89660160.

The previous prime is 122131939. The next prime is 122131949. The reversal of 122131945 is 549131221.

It can be written as a sum of positive squares in 8 ways, for example, as 779689 + 121352256 = 883^2 + 11016^2 .

It is not a de Polignac number, because 122131945 - 2⁵ = 122131913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122131949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5815 + ... + 16675.

It is an arithmetic number, because the mean of its divisors is an integer number (9922437).

Almost surely, 2^122131945 is an apocalyptic number.

It is an amenable number.

122131945 is a deficient number, since it is larger than the sum of its proper divisors (36627047).

122131945 is a wasteful number, since it uses less digits than its factorization.

122131945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11052.

The product of its digits is 2160, while the sum is 28.

The square root of 122131945 is about 11051.3322726267. The cubic root of 122131945 is about 496.1463009828.

The spelling of 122131945 in words is "one hundred twenty-two million, one hundred thirty-one thousand, nine hundred forty-five".