1361204155 has 8 divisors (see below), whose sum is σ = 1633785984. Its totient is φ = 1088736000.

The previous prime is 1361204153. The next prime is 1361204171. The reversal of 1361204155 is 5514021631.

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

It is not a de Polignac number, because 1361204155 - 2¹ = 1361204153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361204153) 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, 630 + ... + 52180.

It is an arithmetic number, because the mean of its divisors is an integer number (204223248).

Almost surely, 2^1361204155 is an apocalyptic number.

1361204155 is a deficient number, since it is larger than the sum of its proper divisors (272581829).

1361204155 is an equidigital number, since it uses as much as digits as its factorization.

1361204155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56837.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1361204155 is about 36894.5003354158. The cubic root of 1361204155 is about 1108.2585454401.

Adding to 1361204155 its reverse (5514021631), we get a palindrome (6875225786).

The spelling of 1361204155 in words is "one billion, three hundred sixty-one million, two hundred four thousand, one hundred fifty-five".