1361332140 has 192 divisors, whose sum is σ = 4734320640. Its totient is φ = 285223680.

The previous prime is 1361332139. The next prime is 1361332199. The reversal of 1361332140 is 412331631.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1361332140.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 244629 + ... + 250131.

It is an arithmetic number, because the mean of its divisors is an integer number (24657920).

Almost surely, 2^1361332140 is an apocalyptic number.

1361332140 is a gapful number since it is divisible by the number (10) 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 1361332140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2367160320).

1361332140 is an abundant number, since it is smaller than the sum of its proper divisors (3372988500).

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

1361332140 is a wasteful number, since it uses less digits than its factorization.

1361332140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5572 (or 5570 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1361332140 is about 36896.2347672496. The cubic root of 1361332140 is about 1108.2932784188.

Adding to 1361332140 its reverse (412331631), we get a palindrome (1773663771).

It can be divided in two parts, 13613 and 32140, that added together give a triangular number (45753 = T₃₀₂).

The spelling of 1361332140 in words is "one billion, three hundred sixty-one million, three hundred thirty-two thousand, one hundred forty".