1520542240 has 96 divisors (see below), whose sum is σ = 4131146880. Its totient is φ = 518068224.

The previous prime is 1520542223. The next prime is 1520542249. The reversal of 1520542240 is 422450251.

It is not an unprimeable number, because it can be changed into a prime (1520542249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178396 + ... + 186724.

It is an arithmetic number, because the mean of its divisors is an integer number (43032780).

Almost surely, 2^1520542240 is an apocalyptic number.

1520542240 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 1520542240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2065573440).

1520542240 is an abundant number, since it is smaller than the sum of its proper divisors (2610604640).

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

1520542240 is a wasteful number, since it uses less digits than its factorization.

1520542240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8514 (or 8506 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 1520542240 is about 38994.1308404226. The cubic root of 1520542240 is about 1149.9161224268.

Adding to 1520542240 its reverse (422450251), we get a palindrome (1942992491).

The spelling of 1520542240 in words is "one billion, five hundred twenty million, five hundred forty-two thousand, two hundred forty".