1097220 has 24 divisors (see below), whose sum is σ = 3072384. Its totient is φ = 292576.

The previous prime is 1097209. The next prime is 1097221. The reversal of 1097220 is 227901.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1097221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9084 + ... + 9203.

It is an arithmetic number, because the mean of its divisors is an integer number (128016).

2^1097220 is an apocalyptic number.

1097220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1097220 is an abundant number, since it is smaller than the sum of its proper divisors (1975164).

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

1097220 is a wasteful number, since it uses less digits than its factorization.

1097220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18299 (or 18297 counting only the distinct ones).

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

The square root of 1097220 is about 1047.4826967545. The cubic root of 1097220 is about 103.1409764045.

The spelling of 1097220 in words is "one million, ninety-seven thousand, two hundred twenty".