1530725420 has 24 divisors (see below), whose sum is σ = 3673741344. Its totient is φ = 524820096.

The previous prime is 1530725419. The next prime is 1530725429. The reversal of 1530725420 is 245270351.

It is a happy number.

It is a super-2 number, since 2×1530725420² = 4686240622868352800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1530725429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5466737 + ... + 5467016.

It is an arithmetic number, because the mean of its divisors is an integer number (153072556).

Almost surely, 2^1530725420 is an apocalyptic number.

1530725420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1530725420 is an abundant number, since it is smaller than the sum of its proper divisors (2143015924).

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

1530725420 is a wasteful number, since it uses less digits than its factorization.

1530725420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10933769 (or 10933767 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 1530725420 is about 39124.4861947093. The cubic root of 1530725420 is about 1152.4774366115.

Adding to 1530725420 its reverse (245270351), we get a palindrome (1775995771).

The spelling of 1530725420 in words is "one billion, five hundred thirty million, seven hundred twenty-five thousand, four hundred twenty".