1285267125 has 16 divisors (see below), whose sum is σ = 2138685120. Its totient is φ = 685475600.

The previous prime is 1285267091. The next prime is 1285267129. The reversal of 1285267125 is 5217625821.

It is not a de Polignac number, because 1285267125 - 2⁹ = 1285266613 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285267129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1713315 + ... + 1714064.

It is an arithmetic number, because the mean of its divisors is an integer number (133667820).

Almost surely, 2^1285267125 is an apocalyptic number.

1285267125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1285267125 is a deficient number, since it is larger than the sum of its proper divisors (853417995).

1285267125 is an equidigital number, since it uses as much as digits as its factorization.

1285267125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3427397 (or 3427387 counting only the distinct ones).

The product of its digits is 67200, while the sum is 39.

The square root of 1285267125 is about 35850.6223795348. The cubic root of 1285267125 is about 1087.2542977750.

The spelling of 1285267125 in words is "one billion, two hundred eighty-five million, two hundred sixty-seven thousand, one hundred twenty-five".