2136571 has 4 divisors (see below), whose sum is σ = 2139712. Its totient is φ = 2133432.

The previous prime is 2136559. The next prime is 2136583. The reversal of 2136571 is 1756312.

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

It is an interprime number because it is at equal distance from previous prime (2136559) and next prime (2136583).

It is a cyclic number.

It is not a de Polignac number, because 2136571 - 2¹⁷ = 2005499 is a prime.

It is a Duffinian number.

2136571 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2136371) 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, 75 + ... + 2068.

It is an arithmetic number, because the mean of its divisors is an integer number (534928).

2^2136571 is an apocalyptic number.

2136571 is a deficient number, since it is larger than the sum of its proper divisors (3141).

2136571 is an equidigital number, since it uses as much as digits as its factorization.

2136571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3140.

The product of its digits is 1260, while the sum is 25.

The square root of 2136571 is about 1461.7014058966. The cubic root of 2136571 is about 128.7970086300.

The spelling of 2136571 in words is "two million, one hundred thirty-six thousand, five hundred seventy-one".