122499840 has 288 divisors, whose sum is σ = 435617280. Its totient is φ = 29196288.

The previous prime is 122499833. The next prime is 122499847. The reversal of 122499840 is 48994221.

It is an interprime number because it is at equal distance from previous prime (122499833) and next prime (122499847).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122499847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1678044 + ... + 1678116.

It is an arithmetic number, because the mean of its divisors is an integer number (1512560).

Almost surely, 2^122499840 is an apocalyptic number.

122499840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122499840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217808640).

122499840 is an abundant number, since it is smaller than the sum of its proper divisors (313117440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122499840 is a wasteful number, since it uses less digits than its factorization.

122499840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 122499840 is about 11067.9645825237. The cubic root of 122499840 is about 496.6439779635.

The spelling of 122499840 in words is "one hundred twenty-two million, four hundred ninety-nine thousand, eight hundred forty".