122402509 has 8 divisors (see below), whose sum is σ = 124338240. Its totient is φ = 120472800.

The previous prime is 122402491. The next prime is 122402519. The reversal of 122402509 is 905204221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 122402509 - 2¹⁷ = 122271437 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 (122402519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56374 + ... + 58504.

It is an arithmetic number, because the mean of its divisors is an integer number (15542280).

Almost surely, 2^122402509 is an apocalyptic number.

It is an amenable number.

122402509 is a deficient number, since it is larger than the sum of its proper divisors (1935731).

122402509 is an equidigital number, since it uses as much as digits as its factorization.

122402509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3011.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 122402509 is about 11063.5667395284. The cubic root of 122402509 is about 496.5124086405.

The spelling of 122402509 in words is "one hundred twenty-two million, four hundred two thousand, five hundred nine".