122725149 has 4 divisors (see below), whose sum is σ = 163633536. Its totient is φ = 81816764.

The previous prime is 122725147. The next prime is 122725181. The reversal of 122725149 is 941527221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 941527221 = 3 ⋅313842407.

It is a cyclic number.

It is not a de Polignac number, because 122725149 - 2¹ = 122725147 is a prime.

It is a super-2 number, since 2×122725149² = 30122924394144402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122725147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20454189 + ... + 20454194.

It is an arithmetic number, because the mean of its divisors is an integer number (40908384).

Almost surely, 2^122725149 is an apocalyptic number.

It is an amenable number.

122725149 is a deficient number, since it is larger than the sum of its proper divisors (40908387).

122725149 is an equidigital number, since it uses as much as digits as its factorization.

122725149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40908386.

The product of its digits is 10080, while the sum is 33.

The square root of 122725149 is about 11078.1383363813. The cubic root of 122725149 is about 496.9482772036.

The spelling of 122725149 in words is "one hundred twenty-two million, seven hundred twenty-five thousand, one hundred forty-nine".