1081269 has 20 divisors (see below), whose sum is σ = 1846944. Its totient is φ = 617544.

The previous prime is 1081247. The next prime is 1081277. The reversal of 1081269 is 9621801.

It is not a de Polignac number, because 1081269 - 2⁵ = 1081237 is a prime.

It is a super-2 number, since 2×1081269² = 2338285300722, which contains 22 as substring.

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 Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

1081269 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 387 + ... + 1520.

2^1081269 is an apocalyptic number.

It is an amenable number.

1081269 is a deficient number, since it is larger than the sum of its proper divisors (765675).

1081269 is an equidigital number, since it uses as much as digits as its factorization.

1081269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1926 (or 1917 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 1081269 is about 1039.8408532078. The cubic root of 1081269 is about 102.6387255067.

The spelling of 1081269 in words is "one million, eighty-one thousand, two hundred sixty-nine".