1133391 has 16 divisors (see below), whose sum is σ = 1783808. Its totient is φ = 626400.

The previous prime is 1133387. The next prime is 1133459. The reversal of 1133391 is 1933311.

1133391 = 176² + 177² + ... + 206².

It is not a de Polignac number, because 1133391 - 2² = 1133387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1133381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220 + ... + 1521.

It is an arithmetic number, because the mean of its divisors is an integer number (111488).

2^1133391 is an apocalyptic number.

1133391 is a deficient number, since it is larger than the sum of its proper divisors (650417).

1133391 is a wasteful number, since it uses less digits than its factorization.

1133391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782.

The product of its digits is 243, while the sum is 21.

The square root of 1133391 is about 1064.6083787008. The cubic root of 1133391 is about 104.2621284534.

The spelling of 1133391 in words is "one million, one hundred thirty-three thousand, three hundred ninety-one".