121542552 has 64 divisors (see below), whose sum is σ = 341157600. Its totient is φ = 40089600.

The previous prime is 121542523. The next prime is 121542559. The reversal of 121542552 is 255245121.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121542559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18052 + ... + 23852.

Almost surely, 2^121542552 is an apocalyptic number.

121542552 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 121542552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170578800).

121542552 is an abundant number, since it is smaller than the sum of its proper divisors (219615048).

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

121542552 is a wasteful number, since it uses less digits than its factorization.

121542552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5913 (or 5903 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 121542552 is about 11024.6338714717. The cubic root of 121542552 is about 495.3469010004.

Adding to 121542552 its reverse (255245121), we get a palindrome (376787673).

It can be divided in two parts, 12154 and 2552, that added together give a triangular number (14706 = T₁₇₁).

The spelling of 121542552 in words is "one hundred twenty-one million, five hundred forty-two thousand, five hundred fifty-two".