121504152 has 128 divisors (see below), whose sum is σ = 389168640. Its totient is φ = 30689280.

The previous prime is 121504127. The next prime is 121504157. The reversal of 121504152 is 251405121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121504157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67488 + ... + 69264.

It is an arithmetic number, because the mean of its divisors is an integer number (3040380).

Almost surely, 2^121504152 is an apocalyptic number.

121504152 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 121504152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194584320).

121504152 is an abundant number, since it is smaller than the sum of its proper divisors (267664488).

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

121504152 is a wasteful number, since it uses less digits than its factorization.

121504152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841 (or 1837 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 121504152 is about 11022.8921794600. The cubic root of 121504152 is about 495.2947290814.

Adding to 121504152 its reverse (251405121), we get a palindrome (372909273).

The spelling of 121504152 in words is "one hundred twenty-one million, five hundred four thousand, one hundred fifty-two".