1284156 has 18 divisors (see below), whose sum is σ = 3246152. Its totient is φ = 428040.

The previous prime is 1284131. The next prime is 1284169. The reversal of 1284156 is 6514821.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17800 + ... + 17871.

2^1284156 is an apocalyptic number.

It is an amenable number.

1284156 is an abundant number, since it is smaller than the sum of its proper divisors (1961996).

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

1284156 is a wasteful number, since it uses less digits than its factorization.

1284156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35681 (or 35676 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1284156 is about 1133.2060712862. The cubic root of 1284156 is about 108.6940893735.

Adding to 1284156 its reverse (6514821), we get a palindrome (7798977).

The spelling of 1284156 in words is "one million, two hundred eighty-four thousand, one hundred fifty-six".