1265366061 has 6 divisors (see below), whose sum is σ = 1827750990. Its totient is φ = 843577368.

The previous prime is 1265366027. The next prime is 1265366099. The reversal of 1265366061 is 1606635621.

1265366061 is a `hidden beast` number, since 1 + 2 + 6 + 536 + 60 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1108490436 + 156875625 = 33294^2 + 12525^2 .

It is not a de Polignac number, because 1265366061 - 2¹¹ = 1265364013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265366761) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70298106 + ... + 70298123.

It is an arithmetic number, because the mean of its divisors is an integer number (304625165).

Almost surely, 2^1265366061 is an apocalyptic number.

It is an amenable number.

1265366061 is a deficient number, since it is larger than the sum of its proper divisors (562384929).

1265366061 is a wasteful number, since it uses less digits than its factorization.

1265366061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140596235 (or 140596232 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 1265366061 is about 35571.9842151095. The cubic root of 1265366061 is about 1081.6134038771.

The spelling of 1265366061 in words is "one billion, two hundred sixty-five million, three hundred sixty-six thousand, sixty-one".