1191256 has 16 divisors (see below), whose sum is σ = 2436840. Its totient is φ = 541440.

The previous prime is 1191247. The next prime is 1191277. The reversal of 1191256 is 6521911.

It is a self number, because there is not a number n which added to its sum of digits gives 1191256.

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, 6681 + ... + 6856.

2^1191256 is an apocalyptic number.

It is an amenable number.

1191256 is an abundant number, since it is smaller than the sum of its proper divisors (1245584).

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

1191256 is a wasteful number, since it uses less digits than its factorization.

1191256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13554 (or 13550 counting only the distinct ones).

The product of its digits is 540, while the sum is 25.

The square root of 1191256 is about 1091.4467462959. The cubic root of 1191256 is about 106.0071194933.

The spelling of 1191256 in words is "one million, one hundred ninety-one thousand, two hundred fifty-six".