121455552 has 56 divisors (see below), whose sum is σ = 322454016. Its totient is φ = 40346368.

The previous prime is 121455547. The next prime is 121455557. The reversal of 121455552 is 255554121.

It is an interprime number because it is at equal distance from previous prime (121455547) and next prime (121455557).

It is a super-2 number, since 2×121455552² = 29502902223249408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121455557) 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 7 ways as a sum of consecutive naturals, for example, 65713 + ... + 67535.

Almost surely, 2^121455552 is an apocalyptic number.

121455552 is a gapful number since it is divisible by the number (12) 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 121455552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161227008).

121455552 is an abundant number, since it is smaller than the sum of its proper divisors (200998464).

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

121455552 is a wasteful number, since it uses less digits than its factorization.

121455552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185 (or 2175 counting only the distinct ones).

The product of its digits is 10000, while the sum is 30.

The square root of 121455552 is about 11020.6874558713. The cubic root of 121455552 is about 495.2286832343.

The spelling of 121455552 in words is "one hundred twenty-one million, four hundred fifty-five thousand, five hundred fifty-two".