1285129135 has 8 divisors (see below), whose sum is σ = 1544897520. Its totient is φ = 1026274944.

The previous prime is 1285129123. The next prime is 1285129159. The reversal of 1285129135 is 5319215821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1285129135 - 2¹⁵ = 1285096367 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1285129094 and 1285129103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225450 + ... + 231079.

It is an arithmetic number, because the mean of its divisors is an integer number (193112190).

Almost surely, 2^1285129135 is an apocalyptic number.

1285129135 is a deficient number, since it is larger than the sum of its proper divisors (259768385).

1285129135 is an equidigital number, since it uses as much as digits as its factorization.

1285129135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457097.

The product of its digits is 21600, while the sum is 37.

The square root of 1285129135 is about 35848.6978145650. The cubic root of 1285129135 is about 1087.2153861260.

The spelling of 1285129135 in words is "one billion, two hundred eighty-five million, one hundred twenty-nine thousand, one hundred thirty-five".