2061539 has 4 divisors (see below), whose sum is σ = 2182824. Its totient is φ = 1940256.

The previous prime is 2061533. The next prime is 2061551. The reversal of 2061539 is 9351602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2061539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2061533) 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, 60617 + ... + 60650.

It is an arithmetic number, because the mean of its divisors is an integer number (545706).

2^2061539 is an apocalyptic number.

2061539 is a deficient number, since it is larger than the sum of its proper divisors (121285).

2061539 is a wasteful number, since it uses less digits than its factorization.

2061539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121284.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 2061539 is about 1435.8060453975. The cubic root of 2061539 is about 127.2713111933.

The spelling of 2061539 in words is "two million, sixty-one thousand, five hundred thirty-nine".