1525620601 has 2 divisors, whose sum is σ = 1525620602. Its totient is φ = 1525620600.

The previous prime is 1525620563. The next prime is 1525620641. The reversal of 1525620601 is 1060265251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1524980601 + 640000 = 39051^2 + 800^2 .

It is an emirp because it is prime and its reverse (1060265251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1525620601 - 2¹⁷ = 1525489529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1525620601.

It is not a weakly prime, because it can be changed into another prime (1525620641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 762810300 + 762810301.

It is an arithmetic number, because the mean of its divisors is an integer number (762810301).

Almost surely, 2^1525620601 is an apocalyptic number.

It is an amenable number.

1525620601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1525620601 is an equidigital number, since it uses as much as digits as its factorization.

1525620601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1525620601 is about 39059.1935528628. The cubic root of 1525620601 is about 1151.1948767798.

Adding to 1525620601 its reverse (1060265251), we get a palindrome (2585885852).

The spelling of 1525620601 in words is "one billion, five hundred twenty-five million, six hundred twenty thousand, six hundred one".