1361515243 has 8 divisors (see below), whose sum is σ = 1563462720. Its totient is φ = 1172596680.

The previous prime is 1361515231. The next prime is 1361515247. The reversal of 1361515243 is 3425151631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1361515243 - 2²¹ = 1359418091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361515247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3257005 + ... + 3257422.

It is an arithmetic number, because the mean of its divisors is an integer number (195432840).

Almost surely, 2^1361515243 is an apocalyptic number.

1361515243 is a deficient number, since it is larger than the sum of its proper divisors (201947477).

1361515243 is a wasteful number, since it uses less digits than its factorization.

1361515243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6514457.

The product of its digits is 10800, while the sum is 31.

The square root of 1361515243 is about 36898.7160074710. The cubic root of 1361515243 is about 1108.3429657117.

Adding to 1361515243 its reverse (3425151631), we get a palindrome (4786666874).

The spelling of 1361515243 in words is "one billion, three hundred sixty-one million, five hundred fifteen thousand, two hundred forty-three".