1525530247 has 2 divisors, whose sum is σ = 1525530248. Its totient is φ = 1525530246.

The previous prime is 1525530229. The next prime is 1525530271. The reversal of 1525530247 is 7420355251.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1525530247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1525530047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 762765123 + 762765124.

It is an arithmetic number, because the mean of its divisors is an integer number (762765124).

Almost surely, 2^1525530247 is an apocalyptic number.

1525530247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1525530247 is an equidigital number, since it uses as much as digits as its factorization.

1525530247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 1525530247 is about 39058.0369066342. The cubic root of 1525530247 is about 1151.1721500469.

Adding to 1525530247 its reverse (7420355251), we get a palindrome (8945885498).

The spelling of 1525530247 in words is "one billion, five hundred twenty-five million, five hundred thirty thousand, two hundred forty-seven".