1097091 has 16 divisors (see below), whose sum is σ = 1641600. Its totient is φ = 724104.

The previous prime is 1097081. The next prime is 1097101. The reversal of 1097091 is 1907901.

It is an interprime number because it is at equal distance from previous prime (1097081) and next prime (1097101).

It is not a de Polignac number, because 1097091 - 2¹¹ = 1095043 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1097051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4720 + ... + 4946.

It is an arithmetic number, because the mean of its divisors is an integer number (102600).

2^1097091 is an apocalyptic number.

1097091 is a deficient number, since it is larger than the sum of its proper divisors (544509).

1097091 is a wasteful number, since it uses less digits than its factorization.

1097091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 567, while the sum is 27.

The square root of 1097091 is about 1047.4211187483. The cubic root of 1097091 is about 103.1369341561.

The spelling of 1097091 in words is "one million, ninety-seven thousand, ninety-one".