1285512 has 32 divisors (see below), whose sum is σ = 3326400. Its totient is φ = 413504.

The previous prime is 1285511. The next prime is 1285513. The reversal of 1285512 is 2155821.

It is an interprime number because it is at equal distance from previous prime (1285511) and next prime (1285513).

It is a super-2 number, since 2×1285512² = 3305082204288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285511) 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, 228 + ... + 1619.

It is an arithmetic number, because the mean of its divisors is an integer number (103950).

2^1285512 is an apocalyptic number.

1285512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1285512 is an abundant number, since it is smaller than the sum of its proper divisors (2040888).

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

1285512 is a wasteful number, since it uses less digits than its factorization.

1285512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885 (or 1881 counting only the distinct ones).

The product of its digits is 800, while the sum is 24.

The square root of 1285512 is about 1133.8042159033. The cubic root of 1285512 is about 108.7323342952.

The spelling of 1285512 in words is "one million, two hundred eighty-five thousand, five hundred twelve".