121522450 has 72 divisors (see below), whose sum is σ = 265325652. Its totient is φ = 41287680.

The previous prime is 121522447. The next prime is 121522451. The reversal of 121522450 is 54225121.

It can be written as a sum of positive squares in 6 ways, for example, as 67190809 + 54331641 = 8197^2 + 7371^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121522451) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 472722 + ... + 472978.

Almost surely, 2^121522450 is an apocalyptic number.

121522450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121522450 is an abundant number, since it is smaller than the sum of its proper divisors (143803202).

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

121522450 is a wasteful number, since it uses less digits than its factorization.

121522450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476 (or 464 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 121522450 is about 11023.7221481676. The cubic root of 121522450 is about 495.3195909151.

Adding to 121522450 its reverse (54225121), we get a palindrome (175747571).

The spelling of 121522450 in words is "one hundred twenty-one million, five hundred twenty-two thousand, four hundred fifty".