122135725 has 18 divisors (see below), whose sum is σ = 154476906. Its totient is φ = 95767200.

The previous prime is 122135719. The next prime is 122135731. The reversal of 122135725 is 527531221.

It is an interprime number because it is at equal distance from previous prime (122135719) and next prime (122135731).

It can be written as a sum of positive squares in 3 ways, for example, as 320356 + 121815369 = 566^2 + 11037^2 .

It is a de Polignac number, because none of the positive numbers 2^k-122135725 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122135693 and 122135702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 431434 + ... + 431716.

Almost surely, 2^122135725 is an apocalyptic number.

It is an amenable number.

122135725 is a deficient number, since it is larger than the sum of its proper divisors (32341181).

122135725 is an frugal number, since it uses more digits than its factorization.

122135725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 349 counting only the distinct ones).

The product of its digits is 4200, while the sum is 28.

The square root of 122135725 is about 11051.5032914079. The cubic root of 122135725 is about 496.1514195281.

Adding to 122135725 its reverse (527531221), we get a palindrome (649666946).

The spelling of 122135725 in words is "one hundred twenty-two million, one hundred thirty-five thousand, seven hundred twenty-five".