121529472 has 64 divisors (see below), whose sum is σ = 339823200. Its totient is φ = 38375424.

The previous prime is 121529437. The next prime is 121529489. The reversal of 121529472 is 274925121.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1033 + ... + 15624.

Almost surely, 2^121529472 is an apocalyptic number.

121529472 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 121529472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169911600).

121529472 is an abundant number, since it is smaller than the sum of its proper divisors (218293728).

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

121529472 is a wasteful number, since it uses less digits than its factorization.

121529472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16693 (or 16681 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 121529472 is about 11024.0406385318. The cubic root of 121529472 is about 495.3291311747.

The spelling of 121529472 in words is "one hundred twenty-one million, five hundred twenty-nine thousand, four hundred seventy-two".