1097580 has 48 divisors (see below), whose sum is σ = 3354624. Its totient is φ = 265920.

The previous prime is 1097557. The next prime is 1097599. The reversal of 1097580 is 857901.

1097580 = T₁₀₉ + T₁₁₀ + ... + T₁₉₈.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172 + ... + 1491.

It is an arithmetic number, because the mean of its divisors is an integer number (69888).

2^1097580 is an apocalyptic number.

1097580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1097580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1677312).

1097580 is an abundant number, since it is smaller than the sum of its proper divisors (2257044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1097580 is a wasteful number, since it uses less digits than its factorization.

1097580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686 (or 1684 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 1097580 is about 1047.6545232089. The cubic root of 1097580 is about 103.1522554222.

The spelling of 1097580 in words is "one million, ninety-seven thousand, five hundred eighty".