1361865255 has 16 divisors (see below), whose sum is σ = 2229659520. Its totient is φ = 709436448.

The previous prime is 1361865233. The next prime is 1361865269. The reversal of 1361865255 is 5525681631.

It is a happy number.

It is not a de Polignac number, because 1361865255 - 2¹⁴ = 1361848871 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1055065 + ... + 1056354.

It is an arithmetic number, because the mean of its divisors is an integer number (139353720).

Almost surely, 2^1361865255 is an apocalyptic number.

1361865255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1361865255 is a deficient number, since it is larger than the sum of its proper divisors (867794265).

1361865255 is a wasteful number, since it uses less digits than its factorization.

1361865255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111470.

The product of its digits is 216000, while the sum is 42.

The square root of 1361865255 is about 36903.4585777539. The cubic root of 1361865255 is about 1108.4379334574.

The spelling of 1361865255 in words is "one billion, three hundred sixty-one million, eight hundred sixty-five thousand, two hundred fifty-five".