1097540 has 12 divisors (see below), whose sum is σ = 2304876. Its totient is φ = 439008.

The previous prime is 1097539. The next prime is 1097543. The reversal of 1097540 is 457901.

It can be written as a sum of positive squares in 2 ways, for example, as 835396 + 262144 = 914^2 + 512^2 .

It is not an unprimeable number, because it can be changed into a prime (1097543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27419 + ... + 27458.

It is an arithmetic number, because the mean of its divisors is an integer number (192073).

2^1097540 is an apocalyptic number.

1097540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1097540 is an abundant number, since it is smaller than the sum of its proper divisors (1207336).

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

1097540 is a wasteful number, since it uses less digits than its factorization.

1097540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54886 (or 54884 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 1097540 is about 1047.6354327723. The cubic root of 1097540 is about 103.1510023198.

The spelling of 1097540 in words is "one million, ninety-seven thousand, five hundred forty".