1525424521 has 2 divisors, whose sum is σ = 1525424522. Its totient is φ = 1525424520.

The previous prime is 1525424497. The next prime is 1525424531. The reversal of 1525424521 is 1254245251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1239814521 + 285610000 = 35211^2 + 16900^2 .

It is a cyclic number.

It is not a de Polignac number, because 1525424521 - 2¹³ = 1525416329 is a prime.

It is not a weakly prime, because it can be changed into another prime (1525424531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 762712260 + 762712261.

It is an arithmetic number, because the mean of its divisors is an integer number (762712261).

Almost surely, 2^1525424521 is an apocalyptic number.

It is an amenable number.

1525424521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1525424521 is an equidigital number, since it uses as much as digits as its factorization.

1525424521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16000, while the sum is 31.

The square root of 1525424521 is about 39056.6834357450. The cubic root of 1525424521 is about 1151.1455556571.

Adding to 1525424521 its reverse (1254245251), we get a palindrome (2779669772).

The spelling of 1525424521 in words is "one billion, five hundred twenty-five million, four hundred twenty-four thousand, five hundred twenty-one".