1361540311 has 4 divisors (see below), whose sum is σ = 1362266800. Its totient is φ = 1360813824.

The previous prime is 1361540303. The next prime is 1361540351. The reversal of 1361540311 is 1130451631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1361540311 - 2³ = 1361540303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361540351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360426 + ... + 364183.

It is an arithmetic number, because the mean of its divisors is an integer number (340566700).

Almost surely, 2^1361540311 is an apocalyptic number.

1361540311 is a deficient number, since it is larger than the sum of its proper divisors (726489).

1361540311 is an equidigital number, since it uses as much as digits as its factorization.

1361540311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726488.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1361540311 is about 36899.0556925242. The cubic root of 1361540311 is about 1108.3497678809.

Adding to 1361540311 its reverse (1130451631), we get a palindrome (2491991942).

The spelling of 1361540311 in words is "one billion, three hundred sixty-one million, five hundred forty thousand, three hundred eleven".