1081917 has 30 divisors (see below), whose sum is σ = 1751838. Its totient is φ = 664848.

The previous prime is 1081907. The next prime is 1081919. The reversal of 1081917 is 7191801.

It can be written as a sum of positive squares in only one way, i.e., 1052676 + 29241 = 1026^2 + 171^2 .

It is not a de Polignac number, because 1081917 - 2⁴ = 1081901 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081919) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 29223 + ... + 29259.

2^1081917 is an apocalyptic number.

It is an amenable number.

1081917 is a deficient number, since it is larger than the sum of its proper divisors (669921).

1081917 is an equidigital number, since it uses as much as digits as its factorization.

1081917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 27.

The square root of 1081917 is about 1040.1523926810. The cubic root of 1081917 is about 102.6592250655.

It can be divided in two parts, 108 and 1917, that added together give a square (2025 = 45²).

The spelling of 1081917 in words is "one million, eighty-one thousand, nine hundred seventeen".