1525027681 has 2 divisors, whose sum is σ = 1525027682. Its totient is φ = 1525027680.

The previous prime is 1525027667. The next prime is 1525027711. The reversal of 1525027681 is 1867205251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1306461025 + 218566656 = 36145^2 + 14784^2 .

It is a cyclic number.

It is not a de Polignac number, because 1525027681 - 2⁵ = 1525027649 is a prime.

It is a super-2 number, since 2×1525027681² = 4651418855632475522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1525027681.

It is not a weakly prime, because it can be changed into another prime (1525027661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 762513840 + 762513841.

It is an arithmetic number, because the mean of its divisors is an integer number (762513841).

Almost surely, 2^1525027681 is an apocalyptic number.

It is an amenable number.

1525027681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1525027681 is an equidigital number, since it uses as much as digits as its factorization.

1525027681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 1525027681 is about 39051.6027968123. The cubic root of 1525027681 is about 1151.0457232900.

The spelling of 1525027681 in words is "one billion, five hundred twenty-five million, twenty-seven thousand, six hundred eighty-one".