1525645049 has 2 divisors, whose sum is σ = 1525645050. Its totient is φ = 1525645048.

The previous prime is 1525645019. The next prime is 1525645133. The reversal of 1525645049 is 9405465251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1491504400 + 34140649 = 38620^2 + 5843^2 .

It is a cyclic number.

It is not a de Polignac number, because 1525645049 - 2¹² = 1525640953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1525644997 and 1525645015.

It is not a weakly prime, because it can be changed into another prime (1525645019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 762822524 + 762822525.

It is an arithmetic number, because the mean of its divisors is an integer number (762822525).

Almost surely, 2^1525645049 is an apocalyptic number.

It is an amenable number.

1525645049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1525645049 is an equidigital number, since it uses as much as digits as its factorization.

1525645049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 41.

The square root of 1525645049 is about 39059.5065124996. The cubic root of 1525645049 is about 1151.2010260286.

The spelling of 1525645049 in words is "one billion, five hundred twenty-five million, six hundred forty-five thousand, forty-nine".