1097420 has 24 divisors (see below), whose sum is σ = 2368464. Its totient is φ = 426816.

The previous prime is 1097419. The next prime is 1097423. The reversal of 1097420 is 247901.

1097420 is nontrivially palindromic in base 8.

It is not an unprimeable number, because it can be changed into a prime (1097423) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2 + ... + 1481.

It is an arithmetic number, because the mean of its divisors is an integer number (98686).

2^1097420 is an apocalyptic number.

1097420 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 1097420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1184232).

1097420 is an abundant number, since it is smaller than the sum of its proper divisors (1271044).

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

1097420 is a wasteful number, since it uses less digits than its factorization.

1097420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529 (or 1527 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1097420 is about 1047.5781593752. The cubic root of 1097420 is about 103.1472428299.

The spelling of 1097420 in words is "one million, ninety-seven thousand, four hundred twenty".