1055605261 has 2 divisors, whose sum is σ = 1055605262. Its totient is φ = 1055605260.

The previous prime is 1055605253. The next prime is 1055605279. The reversal of 1055605261 is 1625065501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1017227236 + 38378025 = 31894^2 + 6195^2 .

It is a cyclic number.

It is not a de Polignac number, because 1055605261 - 2³ = 1055605253 is a prime.

It is a super-2 number, since 2×1055605261² = 2228604934101756242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1055605231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527802630 + 527802631.

It is an arithmetic number, because the mean of its divisors is an integer number (527802631).

Almost surely, 2^1055605261 is an apocalyptic number.

It is an amenable number.

1055605261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1055605261 is an equidigital number, since it uses as much as digits as its factorization.

1055605261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 1055605261 is about 32490.0794243412. The cubic root of 1055605261 is about 1018.2017723727.

The spelling of 1055605261 in words is "one billion, fifty-five million, six hundred five thousand, two hundred sixty-one".