1361255239 has 4 divisors (see below), whose sum is σ = 1380427920. Its totient is φ = 1342082560.

The previous prime is 1361255237. The next prime is 1361255249. The reversal of 1361255239 is 9325521631.

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

It is a cyclic number.

It is not a de Polignac number, because 1361255239 - 2¹ = 1361255237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1361255198 and 1361255207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361255237) 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, 9586234 + ... + 9586375.

It is an arithmetic number, because the mean of its divisors is an integer number (345106980).

Almost surely, 2^1361255239 is an apocalyptic number.

1361255239 is a deficient number, since it is larger than the sum of its proper divisors (19172681).

1361255239 is an equidigital number, since it uses as much as digits as its factorization.

1361255239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19172680.

The product of its digits is 48600, while the sum is 37.

The square root of 1361255239 is about 36895.1926272245. The cubic root of 1361255239 is about 1108.2724090405.

The spelling of 1361255239 in words is "one billion, three hundred sixty-one million, two hundred fifty-five thousand, two hundred thirty-nine".