122251140 has 144 divisors (see below), whose sum is σ = 418279680. Its totient is φ = 29620800.

The previous prime is 122251133. The next prime is 122251159. The reversal of 122251140 is 41152221.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 64405 + ... + 66275.

It is an arithmetic number, because the mean of its divisors is an integer number (2904720).

Almost surely, 2^122251140 is an apocalyptic number.

122251140 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 122251140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209139840).

122251140 is an abundant number, since it is smaller than the sum of its proper divisors (296028540).

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

122251140 is a wasteful number, since it uses less digits than its factorization.

122251140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911 (or 1892 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 122251140 is about 11056.7237462098. The cubic root of 122251140 is about 496.3076536087.

The spelling of 122251140 in words is "one hundred twenty-two million, two hundred fifty-one thousand, one hundred forty".