122251309 has 4 divisors (see below), whose sum is σ = 123461820. Its totient is φ = 121040800.

The previous prime is 122251291. The next prime is 122251333. The reversal of 122251309 is 903152221.

It is a happy number.

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 79388100 + 42863209 = 8910^2 + 6547^2 .

It is a cyclic number.

It is not a de Polignac number, because 122251309 - 2⁹ = 122250797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122251399) 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, 605104 + ... + 605305.

It is an arithmetic number, because the mean of its divisors is an integer number (30865455).

Almost surely, 2^122251309 is an apocalyptic number.

It is an amenable number.

122251309 is a deficient number, since it is larger than the sum of its proper divisors (1210511).

122251309 is a wasteful number, since it uses less digits than its factorization.

122251309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210510.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 122251309 is about 11056.7313886157. The cubic root of 122251309 is about 496.3078823072.

The spelling of 122251309 in words is "one hundred twenty-two million, two hundred fifty-one thousand, three hundred nine".