1285530 has 32 divisors (see below), whose sum is σ = 3132864. Its totient is φ = 337536.

The previous prime is 1285519. The next prime is 1285547. The reversal of 1285530 is 355821.

It is a self number, because there is not a number n which added to its sum of digits gives 1285530.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1897 + ... + 2483.

It is an arithmetic number, because the mean of its divisors is an integer number (97902).

2^1285530 is an apocalyptic number.

1285530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1566432).

1285530 is an abundant number, since it is smaller than the sum of its proper divisors (1847334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1285530 is a wasteful number, since it uses less digits than its factorization.

1285530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1285530 is about 1133.8121537539. The cubic root of 1285530 is about 108.7328417903.

The spelling of 1285530 in words is "one million, two hundred eighty-five thousand, five hundred thirty".