1530721602 has 24 divisors (see below), whose sum is σ = 3342683136. Its totient is φ = 506222136.

The previous prime is 1530721601. The next prime is 1530721631. The reversal of 1530721602 is 2061270351.

It is a happy number.

1530721602 is a `hidden beast` number, since 1 + 5 + 30 + 7 + 21 + 602 = 666.

It is not an unprimeable number, because it can be changed into a prime (1530721601) 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 11 ways as a sum of consecutive naturals, for example, 332518 + ... + 337089.

It is an arithmetic number, because the mean of its divisors is an integer number (139278464).

Almost surely, 2^1530721602 is an apocalyptic number.

1530721602 is an abundant number, since it is smaller than the sum of its proper divisors (1811961534).

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

1530721602 is a wasteful number, since it uses less digits than its factorization.

1530721602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669742 (or 669739 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 1530721602 is about 39124.4374017059. The cubic root of 1530721602 is about 1152.4764784248.

Adding to 1530721602 its reverse (2061270351), we get a palindrome (3591991953).

The spelling of 1530721602 in words is "one billion, five hundred thirty million, seven hundred twenty-one thousand, six hundred two".