1361262205 has 4 divisors (see below), whose sum is σ = 1633514652. Its totient is φ = 1089009760.

The previous prime is 1361262181. The next prime is 1361262247. The reversal of 1361262205 is 5022621631.

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

It can be written as a sum of positive squares in 2 ways, for example, as 365039236 + 996222969 = 19106^2 + 31563^2 .

It is not a de Polignac number, because 1361262205 - 2¹¹ = 1361260157 is a prime.

It is a super-2 number, since 2×1361262205² = 3706069581522924050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136126216 + ... + 136126225.

It is an arithmetic number, because the mean of its divisors is an integer number (408378663).

Almost surely, 2^1361262205 is an apocalyptic number.

It is an amenable number.

1361262205 is a deficient number, since it is larger than the sum of its proper divisors (272252447).

1361262205 is an equidigital number, since it uses as much as digits as its factorization.

1361262205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272252446.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1361262205 is about 36895.2870296465. The cubic root of 1361262205 is about 1108.2742995046.

Adding to 1361262205 its reverse (5022621631), we get a palindrome (6383883836).

The spelling of 1361262205 in words is "one billion, three hundred sixty-one million, two hundred sixty-two thousand, two hundred five".