1097260561 has 2 divisors, whose sum is σ = 1097260562. Its totient is φ = 1097260560.

The previous prime is 1097260547. The next prime is 1097260589. The reversal of 1097260561 is 1650627901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 798627600 + 298632961 = 28260^2 + 17281^2 .

It is a cyclic number.

It is not a de Polignac number, because 1097260561 - 2²⁵ = 1063706129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1097260561.

It is not a weakly prime, because it can be changed into another prime (1097260361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548630280 + 548630281.

It is an arithmetic number, because the mean of its divisors is an integer number (548630281).

Almost surely, 2^1097260561 is an apocalyptic number.

It is an amenable number.

1097260561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1097260561 is an equidigital number, since it uses as much as digits as its factorization.

1097260561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 1097260561 is about 33124.9235621760. The cubic root of 1097260561 is about 1031.4224732844.

The spelling of 1097260561 in words is "one billion, ninety-seven million, two hundred sixty thousand, five hundred sixty-one".