1285399 has 8 divisors (see below), whose sum is σ = 1330560. Its totient is φ = 1241016.

The previous prime is 1285397. The next prime is 1285411. The reversal of 1285399 is 9935821.

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 1285399 - 2¹ = 1285397 is a prime.

It is a Duffinian number.

1285399 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285393) 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, 7092 + ... + 7270.

It is an arithmetic number, because the mean of its divisors is an integer number (166320).

2^1285399 is an apocalyptic number.

1285399 is a deficient number, since it is larger than the sum of its proper divisors (45161).

1285399 is a wasteful number, since it uses less digits than its factorization.

1285399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389.

The product of its digits is 19440, while the sum is 37.

The square root of 1285399 is about 1133.7543825715. The cubic root of 1285399 is about 108.7291482459.

The spelling of 1285399 in words is "one million, two hundred eighty-five thousand, three hundred ninety-nine".