2135591 has 8 divisors (see below), whose sum is σ = 2274480. Its totient is φ = 1998208.

The previous prime is 2135563. The next prime is 2135597. The reversal of 2135591 is 1955312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2135591 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2135591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135597) 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, 4340 + ... + 4806.

It is an arithmetic number, because the mean of its divisors is an integer number (284310).

2^2135591 is an apocalyptic number.

2135591 is a deficient number, since it is larger than the sum of its proper divisors (138889).

2135591 is a wasteful number, since it uses less digits than its factorization.

2135591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753.

The product of its digits is 1350, while the sum is 26.

The square root of 2135591 is about 1461.3661416633. The cubic root of 2135591 is about 128.7773134625. Note that the first 3 decimals are identical.

The spelling of 2135591 in words is "two million, one hundred thirty-five thousand, five hundred ninety-one".