1097400 has 96 divisors (see below), whose sum is σ = 3571200. Its totient is φ = 278400.

The previous prime is 1097381. The next prime is 1097413. The reversal of 1097400 is 47901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18571 + ... + 18629.

It is an arithmetic number, because the mean of its divisors is an integer number (37200).

2^1097400 is an apocalyptic number.

1097400 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 1097400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1785600).

1097400 is an abundant number, since it is smaller than the sum of its proper divisors (2473800).

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

1097400 is a wasteful number, since it uses less digits than its factorization.

1097400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 1097400 is about 1047.5686135046. The cubic root of 1097400 is about 103.1466162217.

Adding to 1097400 its sum of digits (21), we get a triangular number (1097421 = T₁₄₈₁).

The spelling of 1097400 in words is "one million, ninety-seven thousand, four hundred".