1340521520 has 160 divisors (see below), whose sum is σ = 3506025600. Its totient is φ = 476077056.

The previous prime is 1340521493. The next prime is 1340521541. The reversal of 1340521520 is 251250431.

It is a super-2 number, since 2×1340521520² = 3593995891166220800, which contains 22 as substring.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 5096909 + ... + 5097171.

It is an arithmetic number, because the mean of its divisors is an integer number (21912660).

Almost surely, 2^1340521520 is an apocalyptic number.

1340521520 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 1340521520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1753012800).

1340521520 is an abundant number, since it is smaller than the sum of its proper divisors (2165504080).

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

1340521520 is a wasteful number, since it uses less digits than its factorization.

1340521520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1340521520 is about 36613.1331628420. The cubic root of 1340521520 is about 1102.6167783022.

Adding to 1340521520 its reverse (251250431), we get a palindrome (1591771951).

The spelling of 1340521520 in words is "one billion, three hundred forty million, five hundred twenty-one thousand, five hundred twenty".