1361894081 has 4 divisors (see below), whose sum is σ = 1362264000. Its totient is φ = 1361524164.

The previous prime is 1361894041. The next prime is 1361894099. The reversal of 1361894081 is 1804981631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1361894081 - 2¹⁴ = 1361877697 is a prime.

It is a super-2 number, since 2×1361894081² = 3709510975725669122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1361894011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179381 + ... + 186818.

It is an arithmetic number, because the mean of its divisors is an integer number (340566000).

Almost surely, 2^1361894081 is an apocalyptic number.

It is an amenable number.

1361894081 is a deficient number, since it is larger than the sum of its proper divisors (369919).

1361894081 is an equidigital number, since it uses as much as digits as its factorization.

1361894081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369918.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 1361894081 is about 36903.8491352867. The cubic root of 1361894081 is about 1108.4457540076.

The spelling of 1361894081 in words is "one billion, three hundred sixty-one million, eight hundred ninety-four thousand, eighty-one".