1097591 has 12 divisors (see below), whose sum is σ = 1238496. Its totient is φ = 971520.

The previous prime is 1097557. The next prime is 1097599. The reversal of 1097591 is 1957901.

It is a de Polignac number, because none of the positive numbers 2^k-1097591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097599) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5591 + ... + 5783.

It is an arithmetic number, because the mean of its divisors is an integer number (103208).

2^1097591 is an apocalyptic number.

1097591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1097591 is a deficient number, since it is larger than the sum of its proper divisors (140905).

1097591 is a wasteful number, since it uses less digits than its factorization.

1097591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 2835, while the sum is 32.

The square root of 1097591 is about 1047.6597730179. The cubic root of 1097591 is about 103.1526000200.

The spelling of 1097591 in words is "one million, ninety-seven thousand, five hundred ninety-one".