123021340 has 24 divisors (see below), whose sum is σ = 278218080. Its totient is φ = 45423168.

The previous prime is 123021331. The next prime is 123021359. The reversal of 123021340 is 43120321.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236320 + ... + 236839.

It is an arithmetic number, because the mean of its divisors is an integer number (11592420).

Almost surely, 2^123021340 is an apocalyptic number.

123021340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123021340 is an abundant number, since it is smaller than the sum of its proper divisors (155196740).

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

123021340 is a wasteful number, since it uses less digits than its factorization.

123021340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473181 (or 473179 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 123021340 is about 11091.4985461839. The cubic root of 123021340 is about 497.3477426044.

Adding to 123021340 its reverse (43120321), we get a palindrome (166141661).

The spelling of 123021340 in words is "one hundred twenty-three million, twenty-one thousand, three hundred forty".