2135549 has 8 divisors (see below), whose sum is σ = 2338392. Its totient is φ = 1938240.

The previous prime is 2135537. The next prime is 2135563. The reversal of 2135549 is 9455312.

It can be written as a sum of positive squares in 4 ways, for example, as 47524 + 2088025 = 218^2 + 1445^2 .

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 2135549 - 2⁴ = 2135533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135519) 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, 554 + ... + 2139.

It is an arithmetic number, because the mean of its divisors is an integer number (292299).

2^2135549 is an apocalyptic number.

It is an amenable number.

2135549 is a deficient number, since it is larger than the sum of its proper divisors (202843).

2135549 is a wasteful number, since it uses less digits than its factorization.

2135549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2767.

The product of its digits is 5400, while the sum is 29.

The square root of 2135549 is about 1461.3517714774. The cubic root of 2135549 is about 128.7764692492.

The spelling of 2135549 in words is "two million, one hundred thirty-five thousand, five hundred forty-nine".