121601250 has 100 divisors (see below), whose sum is σ = 340770606. Its totient is φ = 32400000.

The previous prime is 121601213. The next prime is 121601257. The reversal of 121601250 is 52106121.

121601250 is a `hidden beast` number, since 12 + 1 + 601 + 2 + 50 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 8242641 + 113358609 = 2871^2 + 10647^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 15.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (121601257) by changing a digit.

It is a polite number, since it can be written in 49 ways as a sum of consecutive naturals, for example, 100650 + ... + 101850.

Almost surely, 2^121601250 is an apocalyptic number.

121601250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121601250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170385303).

121601250 is an abundant number, since it is smaller than the sum of its proper divisors (219169356).

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

121601250 is an equidigital number, since it uses as much as digits as its factorization.

121601250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235 (or 1211 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 121601250 is about 11027.2956793586. The cubic root of 121601250 is about 495.4266294372.

Adding to 121601250 its reverse (52106121), we get a palindrome (173707371).

The spelling of 121601250 in words is "one hundred twenty-one million, six hundred one thousand, two hundred fifty".