1120721340 has 48 divisors (see below), whose sum is σ = 3139587360. Its totient is φ = 298709760.

The previous prime is 1120721339. The next prime is 1120721363. The reversal of 1120721340 is 431270211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171330 + ... + 177750.

It is an arithmetic number, because the mean of its divisors is an integer number (65408070).

Almost surely, 2^1120721340 is an apocalyptic number.

1120721340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1120721340 is an abundant number, since it is smaller than the sum of its proper divisors (2018866020).

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

1120721340 is a wasteful number, since it uses less digits than its factorization.

1120721340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9342 (or 9340 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1120721340 is about 33477.1764042310. The cubic root of 1120721340 is about 1038.7217221482.

Adding to 1120721340 its reverse (431270211), we get a palindrome (1551991551).

The spelling of 1120721340 in words is "one billion, one hundred twenty million, seven hundred twenty-one thousand, three hundred forty".