122143240 has 32 divisors (see below), whose sum is σ = 275396760. Its totient is φ = 48755200.

The previous prime is 122143213. The next prime is 122143261. The reversal of 122143240 is 42341221.

It can be written as a sum of positive squares in 4 ways, for example, as 83429956 + 38713284 = 9134^2 + 6222^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 17910 + ... + 23770.

Almost surely, 2^122143240 is an apocalyptic number.

122143240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122143240 is an abundant number, since it is smaller than the sum of its proper divisors (153253520).

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

122143240 is a wasteful number, since it uses less digits than its factorization.

122143240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6393 (or 6389 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 122143240 is about 11051.8432851719. The cubic root of 122143240 is about 496.1615953699.

Adding to 122143240 its reverse (42341221), we get a palindrome (164484461).

The spelling of 122143240 in words is "one hundred twenty-two million, one hundred forty-three thousand, two hundred forty".