121650256 has 60 divisors (see below), whose sum is σ = 291728352. Its totient is φ = 48117888.

The previous prime is 121650253. The next prime is 121650257. The reversal of 121650256 is 652056121.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121650251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15715 + ... + 22141.

Almost surely, 2^121650256 is an apocalyptic number.

121650256 is a gapful number since it is divisible by the number (16) 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 121650256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145864176).

121650256 is an abundant number, since it is smaller than the sum of its proper divisors (170078096).

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

121650256 is a wasteful number, since it uses less digits than its factorization.

121650256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6468 (or 6449 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 121650256 is about 11029.5174871796. The cubic root of 121650256 is about 495.4931737548.

The spelling of 121650256 in words is "one hundred twenty-one million, six hundred fifty thousand, two hundred fifty-six".