121623040 has 160 divisors (see below), whose sum is σ = 364155264. Its totient is φ = 37847040.

The previous prime is 121622999. The next prime is 121623053. The reversal of 121623040 is 40326121.

It is a tau number, because it is divible by the number of its divisors (160).

It is a junction number, because it is equal to n+sod(n) for n = 121622999 and 121623017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196812 + ... + 197428.

Almost surely, 2^121623040 is an apocalyptic number.

121623040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121623040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182077632).

121623040 is an abundant number, since it is smaller than the sum of its proper divisors (242532224).

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

121623040 is an equidigital number, since it uses as much as digits as its factorization.

121623040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658 (or 642 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 121623040 is about 11028.2836379919. The cubic root of 121623040 is about 495.4562198718.

Adding to 121623040 its reverse (40326121), we get a palindrome (161949161).

The spelling of 121623040 in words is "one hundred twenty-one million, six hundred twenty-three thousand, forty".