1285629 has 8 divisors (see below), whose sum is σ = 1731552. Its totient is φ = 848400.

The previous prime is 1285619. The next prime is 1285633. The reversal of 1285629 is 9265821.

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

It is not a de Polignac number, because 1285629 - 2⁹ = 1285117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1285629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285619) 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, 1819 + ... + 2424.

It is an arithmetic number, because the mean of its divisors is an integer number (216444).

2^1285629 is an apocalyptic number.

It is an amenable number.

1285629 is a deficient number, since it is larger than the sum of its proper divisors (445923).

1285629 is a wasteful number, since it uses less digits than its factorization.

1285629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4347.

The product of its digits is 8640, while the sum is 33.

The square root of 1285629 is about 1133.8558109389. The cubic root of 1285629 is about 108.7356329283.

The spelling of 1285629 in words is "one million, two hundred eighty-five thousand, six hundred twenty-nine".