122440 has 16 divisors (see below), whose sum is σ = 275580. Its totient is φ = 48960.

The previous prime is 122401. The next prime is 122443. The reversal of 122440 is 44221.

It can be written as a sum of positive squares in 2 ways, for example, as 116964 + 5476 = 342^2 + 74^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 122440.

It is not an unprimeable number, because it can be changed into a prime (122443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1491 + ... + 1570.

2¹²²⁴⁴⁰ is an apocalyptic number.

122440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122440 is an abundant number, since it is smaller than the sum of its proper divisors (153140).

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

122440 is a wasteful number, since it uses less digits than its factorization.

122440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3072 (or 3068 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 122440 is about 349.9142752161. The cubic root of 122440 is about 49.6563096181.

Adding to 122440 its reverse (44221), we get a palindrome (166661).

The spelling of 122440 in words is "one hundred twenty-two thousand, four hundred forty", and thus it is an iban number.