1285406 has 8 divisors (see below), whose sum is σ = 1932984. Its totient is φ = 641080.

The previous prime is 1285397. The next prime is 1285411. The reversal of 1285406 is 6045821.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 896 + ... + 1836.

It is an arithmetic number, because the mean of its divisors is an integer number (241623).

2^1285406 is an apocalyptic number.

1285406 is a deficient number, since it is larger than the sum of its proper divisors (647578).

1285406 is an equidigital number, since it uses as much as digits as its factorization.

1285406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 1285406 is about 1133.7574696557. The cubic root of 1285406 is about 108.7293456172.

The spelling of 1285406 in words is "one million, two hundred eighty-five thousand, four hundred six".