1530125640 has 80 divisors (see below), whose sum is σ = 5142933180. Its totient is φ = 408032640.

The previous prime is 1530125633. The next prime is 1530125671. The reversal of 1530125640 is 465210351.

1530125640 is a `hidden beast` number, since 1 + 5 + 3 + 0 + 12 + 5 + 640 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1274061636 + 256064004 = 35694^2 + 16002^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

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 19 ways as a sum of consecutive naturals, for example, 232891 + ... + 239370.

Almost surely, 2^1530125640 is an apocalyptic number.

1530125640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1530125640 is an abundant number, since it is smaller than the sum of its proper divisors (3612807540).

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

1530125640 is a wasteful number, since it uses less digits than its factorization.

1530125640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472284 (or 472271 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1530125640 is about 39116.8204229332. The cubic root of 1530125640 is about 1152.3268929088.

Adding to 1530125640 its reverse (465210351), we get a palindrome (1995335991).

It can be divided in two parts, 1 and 530125640, that added together give a triangular number (530125641 = T₃₂₅₆₁).

The spelling of 1530125640 in words is "one billion, five hundred thirty million, one hundred twenty-five thousand, six hundred forty".