2136865 has 8 divisors (see below), whose sum is σ = 2652840. Its totient is φ = 1650432.

The previous prime is 2136863. The next prime is 2136877. The reversal of 2136865 is 5686312.

2136865 = T₉₄ + T₉₅ + ... + T₂₃₈.

It can be written as a sum of positive squares in 4 ways, for example, as 541696 + 1595169 = 736^2 + 1263^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2136865 - 2¹ = 2136863 is a prime.

It is a d-powerful number, because it can be written as 2⁵ + 1 + 3¹¹ + 6⁷ + 8 + 6⁸ + 5³ .

It is not an unprimeable number, because it can be changed into a prime (2136863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7224 + ... + 7513.

It is an arithmetic number, because the mean of its divisors is an integer number (331605).

2^2136865 is an apocalyptic number.

It is an amenable number.

2136865 is a deficient number, since it is larger than the sum of its proper divisors (515975).

2136865 is a wasteful number, since it uses less digits than its factorization.

2136865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14771.

The product of its digits is 8640, while the sum is 31.

The square root of 2136865 is about 1461.8019701724. The cubic root of 2136865 is about 128.8029160059.

The spelling of 2136865 in words is "two million, one hundred thirty-six thousand, eight hundred sixty-five".