122012749 has 4 divisors (see below), whose sum is σ = 124013020. Its totient is φ = 120012480.

The previous prime is 122012741. The next prime is 122012753. The reversal of 122012749 is 947210221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10562500 + 111450249 = 3250^2 + 10557^2 .

It is a cyclic number.

It is not a de Polignac number, because 122012749 - 2³ = 122012741 is a prime.

It is a super-2 number, since 2×122012749² = 29774221837074002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122012741) 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, 1000044 + ... + 1000165.

It is an arithmetic number, because the mean of its divisors is an integer number (31003255).

Almost surely, 2^122012749 is an apocalyptic number.

It is an amenable number.

122012749 is a deficient number, since it is larger than the sum of its proper divisors (2000271).

122012749 is an equidigital number, since it uses as much as digits as its factorization.

122012749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000270.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 122012749 is about 11045.9381222239. The cubic root of 122012749 is about 495.9848419860.

The spelling of 122012749 in words is "one hundred twenty-two million, twelve thousand, seven hundred forty-nine".