1251529 has 2 divisors, whose sum is σ = 1251530. Its totient is φ = 1251528.

The previous prime is 1251527. The next prime is 1251533. The reversal of 1251529 is 9251521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 725904 + 525625 = 852^2 + 725^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251529 - 2¹ = 1251527 is a prime.

Together with 1251527, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1251527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625764 + 625765.

It is an arithmetic number, because the mean of its divisors is an integer number (625765).

2^1251529 is an apocalyptic number.

It is an amenable number.

1251529 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251529 is an equidigital number, since it uses as much as digits as its factorization.

1251529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900, while the sum is 25.

The square root of 1251529 is about 1118.7175693623. The cubic root of 1251529 is about 107.7656383473.

It can be divided in two parts, 12515 and 29, that added together give a square (12544 = 112²).

The spelling of 1251529 in words is "one million, two hundred fifty-one thousand, five hundred twenty-nine".