1361265249 has 16 divisors (see below), whose sum is σ = 1884568320. Its totient is φ = 872968320.

The previous prime is 1361265247. The next prime is 1361265289. The reversal of 1361265249 is 9425621631.

It is not a de Polignac number, because 1361265249 - 2¹ = 1361265247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1361265247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5292 + ... + 52445.

It is an arithmetic number, because the mean of its divisors is an integer number (117785520).

Almost surely, 2^1361265249 is an apocalyptic number.

It is an amenable number.

1361265249 is a deficient number, since it is larger than the sum of its proper divisors (523303071).

1361265249 is a wasteful number, since it uses less digits than its factorization.

1361265249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58040.

The product of its digits is 77760, while the sum is 39.

The square root of 1361265249 is about 36895.3282815047. The cubic root of 1361265249 is about 1108.2751255968.

The spelling of 1361265249 in words is "one billion, three hundred sixty-one million, two hundred sixty-five thousand, two hundred forty-nine".