11865039 has 4 divisors (see below), whose sum is σ = 15820056. Its totient is φ = 7910024.

The previous prime is 11865037. The next prime is 11865047. The reversal of 11865039 is 93056811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93056811 = 3 ⋅31018937.

It is a cyclic number.

It is not a de Polignac number, because 11865039 - 2¹ = 11865037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11865037) 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, 1977504 + ... + 1977509.

It is an arithmetic number, because the mean of its divisors is an integer number (3955014).

Almost surely, 2^11865039 is an apocalyptic number.

11865039 is a deficient number, since it is larger than the sum of its proper divisors (3955017).

11865039 is an equidigital number, since it uses as much as digits as its factorization.

11865039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3955016.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 11865039 is about 3444.5665910242. The cubic root of 11865039 is about 228.0813229448.

The spelling of 11865039 in words is "eleven million, eight hundred sixty-five thousand, thirty-nine".