1162721140 has 48 divisors (see below), whose sum is σ = 2809062144. Its totient is φ = 396000000.

The previous prime is 1162721117. The next prime is 1162721141. The reversal of 1162721140 is 411272611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1162721141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6361 + ... + 48640.

It is an arithmetic number, because the mean of its divisors is an integer number (58522128).

Almost surely, 2^1162721140 is an apocalyptic number.

1162721140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1162721140 is an abundant number, since it is smaller than the sum of its proper divisors (1646341004).

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

1162721140 is a wasteful number, since it uses less digits than its factorization.

1162721140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55168 (or 55166 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1162721140 is about 34098.6970425557. The cubic root of 1162721140 is about 1051.5385276180.

Adding to 1162721140 its reverse (411272611), we get a palindrome (1573993751).

The spelling of 1162721140 in words is "one billion, one hundred sixty-two million, seven hundred twenty-one thousand, one hundred forty".