121263240 has 192 divisors, whose sum is σ = 434367360. Its totient is φ = 26987520.

The previous prime is 121263229. The next prime is 121263257. The reversal of 121263240 is 42362121.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 240829 + ... + 241331.

It is an arithmetic number, because the mean of its divisors is an integer number (2262330).

Almost surely, 2^121263240 is an apocalyptic number.

121263240 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 121263240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217183680).

121263240 is an abundant number, since it is smaller than the sum of its proper divisors (313104120).

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

121263240 is a wasteful number, since it uses less digits than its factorization.

121263240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 561 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 121263240 is about 11011.9589537920. The cubic root of 121263240 is about 494.9671644376.

The spelling of 121263240 in words is "one hundred twenty-one million, two hundred sixty-three thousand, two hundred forty".