123221940 has 24 divisors (see below), whose sum is σ = 345021600. Its totient is φ = 32859168.

The previous prime is 123221939. The next prime is 123221941. The reversal of 123221940 is 49122321.

It is an interprime number because it is at equal distance from previous prime (123221939) and next prime (123221941).

It is a self number, because there is not a number n which added to its sum of digits gives 123221940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123221941) 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, 1026790 + ... + 1026909.

It is an arithmetic number, because the mean of its divisors is an integer number (14375900).

Almost surely, 2^123221940 is an apocalyptic number.

123221940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123221940 is an abundant number, since it is smaller than the sum of its proper divisors (221799660).

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

123221940 is a wasteful number, since it uses less digits than its factorization.

123221940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053711 (or 2053709 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 123221940 is about 11100.5378248083. The cubic root of 123221940 is about 497.6179227716.

The spelling of 123221940 in words is "one hundred twenty-three million, two hundred twenty-one thousand, nine hundred forty".