122861280 has 48 divisors (see below), whose sum is σ = 387014544. Its totient is φ = 32762880.

The previous prime is 122861273. The next prime is 122861281. The reversal of 122861280 is 82168221.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122861281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127501 + ... + 128460.

It is an arithmetic number, because the mean of its divisors is an integer number (8062803).

Almost surely, 2^122861280 is an apocalyptic number.

122861280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122861280 is an abundant number, since it is smaller than the sum of its proper divisors (264153264).

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

122861280 is a wasteful number, since it uses less digits than its factorization.

122861280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255979 (or 255971 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 122861280 is about 11084.2807615109. The cubic root of 122861280 is about 497.1319534064.

The spelling of 122861280 in words is "one hundred twenty-two million, eight hundred sixty-one thousand, two hundred eighty".