120721272 has 32 divisors (see below), whose sum is σ = 344918400. Its totient is φ = 34491744.

The previous prime is 120721241. The next prime is 120721277. The reversal of 120721272 is 272127021.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120721277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359122 + ... + 359457.

It is an arithmetic number, because the mean of its divisors is an integer number (10778700).

Almost surely, 2^120721272 is an apocalyptic number.

120721272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

120721272 is an abundant number, since it is smaller than the sum of its proper divisors (224197128).

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

120721272 is a wasteful number, since it uses less digits than its factorization.

120721272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718595 (or 718591 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 120721272 is about 10987.3232408990. The cubic root of 120721272 is about 494.2286691238.

Adding to 120721272 its reverse (272127021), we get a palindrome (392848293).

The spelling of 120721272 in words is "one hundred twenty million, seven hundred twenty-one thousand, two hundred seventy-two".