121723560 has 192 divisors, whose sum is σ = 469123200. Its totient is φ = 27806976.

The previous prime is 121723507. The next prime is 121723603. The reversal of 121723560 is 65327121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67146 + ... + 68934.

It is an arithmetic number, because the mean of its divisors is an integer number (2443350).

Almost surely, 2^121723560 is an apocalyptic number.

121723560 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 121723560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234561600).

121723560 is an abundant number, since it is smaller than the sum of its proper divisors (347399640).

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

121723560 is a wasteful number, since it uses less digits than its factorization.

121723560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822 (or 1806 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 121723560 is about 11032.8400695379. The cubic root of 121723560 is about 495.5926785146.

The spelling of 121723560 in words is "one hundred twenty-one million, seven hundred twenty-three thousand, five hundred sixty".