1361239165 has 32 divisors (see below), whose sum is σ = 1921885056. Its totient is φ = 912495360.

The previous prime is 1361239151. The next prime is 1361239169. The reversal of 1361239165 is 5619321631.

It is a happy number.

It is not a de Polignac number, because 1361239165 - 2⁷ = 1361239037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361239169) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 830727 + ... + 832363.

It is an arithmetic number, because the mean of its divisors is an integer number (60058908).

Almost surely, 2^1361239165 is an apocalyptic number.

It is an amenable number.

1361239165 is a deficient number, since it is larger than the sum of its proper divisors (560645891).

1361239165 is a wasteful number, since it uses less digits than its factorization.

1361239165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2829.

The product of its digits is 29160, while the sum is 37.

The square root of 1361239165 is about 36894.9747933238. The cubic root of 1361239165 is about 1108.2680467822.

The spelling of 1361239165 in words is "one billion, three hundred sixty-one million, two hundred thirty-nine thousand, one hundred sixty-five".