1097915825 has 18 divisors (see below), whose sum is σ = 1371883734. Its totient is φ = 871630080.

The previous prime is 1097915821. The next prime is 1097915827. The reversal of 1097915825 is 5285197901.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 229552801 + 868363024 = 15151^2 + 29468^2 .

It is not a de Polignac number, because 1097915825 - 2² = 1097915821 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1097915825.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097915821) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 481889 + ... + 484161.

It is an arithmetic number, because the mean of its divisors is an integer number (76215763).

Almost surely, 2^1097915825 is an apocalyptic number.

It is an amenable number.

1097915825 is a deficient number, since it is larger than the sum of its proper divisors (273967909).

1097915825 is an equidigital number, since it uses as much as digits as its factorization.

1097915825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561 (or 2417 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 47.

The square root of 1097915825 is about 33134.8128861474. The cubic root of 1097915825 is about 1031.6277479925.

The spelling of 1097915825 in words is "one billion, ninety-seven million, nine hundred fifteen thousand, eight hundred twenty-five".