1263156 has 12 divisors (see below), whose sum is σ = 2947392. Its totient is φ = 421048.

The previous prime is 1263133. The next prime is 1263173. The reversal of 1263156 is 6513621.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

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, 52620 + ... + 52643.

It is an arithmetic number, because the mean of its divisors is an integer number (245616).

2^1263156 is an apocalyptic number.

It is an amenable number.

1263156 is an abundant number, since it is smaller than the sum of its proper divisors (1684236).

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

1263156 is a wasteful number, since it uses less digits than its factorization.

1263156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105270 (or 105268 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 1263156 is about 1123.9021309705. The cubic root of 1263156 is about 108.0983329382.

Adding to 1263156 its reverse (6513621), we get a palindrome (7776777).

The spelling of 1263156 in words is "one million, two hundred sixty-three thousand, one hundred fifty-six".