122749770 has 192 divisors, whose sum is σ = 364290048. Its totient is φ = 26208000.

The previous prime is 122749769. The next prime is 122749771. The reversal of 122749770 is 77947221.

It is an interprime number because it is at equal distance from previous prime (122749769) and next prime (122749771).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (122749771) 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 95 ways as a sum of consecutive naturals, for example, 1728835 + ... + 1728905.

It is an arithmetic number, because the mean of its divisors is an integer number (1897344).

Almost surely, 2^122749770 is an apocalyptic number.

122749770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 122749770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182145024).

122749770 is an abundant number, since it is smaller than the sum of its proper divisors (241540278).

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

122749770 is a wasteful number, since it uses less digits than its factorization.

122749770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 39.

The square root of 122749770 is about 11079.2495233206. The cubic root of 122749770 is about 496.9815074081.

The spelling of 122749770 in words is "one hundred twenty-two million, seven hundred forty-nine thousand, seven hundred seventy".