21035741 has 4 divisors (see below), whose sum is σ = 21222012. Its totient is φ = 20849472.

The previous prime is 21035737. The next prime is 21035761. The reversal of 21035741 is 14753012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9672100 + 11363641 = 3110^2 + 3371^2 .

It is a cyclic number.

It is not a de Polignac number, because 21035741 - 2² = 21035737 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 (21035761) 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, 92966 + ... + 93191.

It is an arithmetic number, because the mean of its divisors is an integer number (5305503).

Almost surely, 2^21035741 is an apocalyptic number.

It is an amenable number.

21035741 is a deficient number, since it is larger than the sum of its proper divisors (186271).

21035741 is a wasteful number, since it uses less digits than its factorization.

21035741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186270.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 21035741 is about 4586.4736999137. The cubic root of 21035741 is about 276.0488475119.

Adding to 21035741 its reverse (14753012), we get a palindrome (35788753).

The spelling of 21035741 in words is "twenty-one million, thirty-five thousand, seven hundred forty-one".