1542721008 has 20 divisors (see below), whose sum is σ = 3985362728. Its totient is φ = 514240320.

The previous prime is 1542721003. The next prime is 1542721009. The reversal of 1542721008 is 8001272451.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542721001) 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 3 ways as a sum of consecutive naturals, for example, 16069963 + ... + 16070058.

Almost surely, 2^1542721008 is an apocalyptic number.

It is an amenable number.

1542721008 is an abundant number, since it is smaller than the sum of its proper divisors (2442641720).

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

1542721008 is a wasteful number, since it uses less digits than its factorization.

1542721008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32140032 (or 32140026 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 1542721008 is about 39277.4872923409. The cubic root of 1542721008 is about 1155.4800845242.

Adding to 1542721008 its reverse (8001272451), we get a palindrome (9543993459).

The spelling of 1542721008 in words is "one billion, five hundred forty-two million, seven hundred twenty-one thousand, eight".