1285632025 has 12 divisors (see below), whose sum is σ = 1596313132. Its totient is φ = 1027131840.

The previous prime is 1285631999. The next prime is 1285632037. The reversal of 1285632025 is 5202365821.

It can be written as a sum of positive squares in 6 ways, for example, as 35868121 + 1249763904 = 5989^2 + 35352^2 .

It is not a de Polignac number, because 1285632025 - 2⁵ = 1285631993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15042 + ... + 52891.

Almost surely, 2^1285632025 is an apocalyptic number.

It is an amenable number.

1285632025 is a deficient number, since it is larger than the sum of its proper divisors (310681107).

1285632025 is an equidigital number, since it uses as much as digits as its factorization.

1285632025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68700 (or 68695 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 1285632025 is about 35855.7111908270. The cubic root of 1285632025 is about 1087.3571821082.

Adding to 1285632025 its reverse (5202365821), we get a palindrome (6487997846).

The spelling of 1285632025 in words is "one billion, two hundred eighty-five million, six hundred thirty-two thousand, twenty-five".