121472136 has 80 divisors (see below), whose sum is σ = 351267840. Its totient is φ = 39178080.

The previous prime is 121472129. The next prime is 121472137. The reversal of 121472136 is 631274121.

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

It is not an unprimeable number, because it can be changed into a prime (121472137) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17065 + ... + 23111.

It is an arithmetic number, because the mean of its divisors is an integer number (4390848).

Almost surely, 2^121472136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121472136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175633920).

121472136 is an abundant number, since it is smaller than the sum of its proper divisors (229795704).

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

121472136 is a wasteful number, since it uses less digits than its factorization.

121472136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6096 (or 6083 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 121472136 is about 11021.4398333430. The cubic root of 121472136 is about 495.2512223404.

The spelling of 121472136 in words is "one hundred twenty-one million, four hundred seventy-two thousand, one hundred thirty-six".