1525421530 has 8 divisors (see below), whose sum is σ = 2745758772. Its totient is φ = 610168608.

The previous prime is 1525421501. The next prime is 1525421609. The reversal of 1525421530 is 351245251.

It can be written as a sum of positive squares in 2 ways, for example, as 1236999241 + 288422289 = 35171^2 + 16983^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 76271067 + ... + 76271086.

Almost surely, 2^1525421530 is an apocalyptic number.

1525421530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1525421530 is a deficient number, since it is larger than the sum of its proper divisors (1220337242).

1525421530 is a wasteful number, since it uses less digits than its factorization.

1525421530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152542160.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1525421530 is about 39056.6451452246. The cubic root of 1525421530 is about 1151.1448032810.

Adding to 1525421530 its reverse (351245251), we get a palindrome (1876666781).

The spelling of 1525421530 in words is "one billion, five hundred twenty-five million, four hundred twenty-one thousand, five hundred thirty".