1285360385 has 8 divisors (see below), whose sum is σ = 1543845096. Its totient is φ = 1027346560.

The previous prime is 1285360333. The next prime is 1285360387. The reversal of 1285360385 is 5830635821.

It can be written as a sum of positive squares in 4 ways, for example, as 251159104 + 1034201281 = 15848^2 + 32159^2 .

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

It is not a de Polignac number, because 1285360385 - 2¹⁶ = 1285294849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1285360387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111686 + ... + 122655.

It is an arithmetic number, because the mean of its divisors is an integer number (192980637).

Almost surely, 2^1285360385 is an apocalyptic number.

It is an amenable number.

1285360385 is a deficient number, since it is larger than the sum of its proper divisors (258484711).

1285360385 is a wasteful number, since it uses less digits than its factorization.

1285360385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235443.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 1285360385 is about 35851.9230307106. The cubic root of 1285360385 is about 1087.2805944832.

The spelling of 1285360385 in words is "one billion, two hundred eighty-five million, three hundred sixty thousand, three hundred eighty-five".