6743621 has 4 divisors (see below), whose sum is σ = 6786732. Its totient is φ = 6700512.

The previous prime is 6743609. The next prime is 6743629. The reversal of 6743621 is 1263476.

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 1050625 + 5692996 = 1025^2 + 2386^2 .

It is a cyclic number.

It is not a de Polignac number, because 6743621 - 2¹⁸ = 6481477 is a prime.

It is a d-powerful number, because it can be written as 6² + 7⁵ + 4⁹ + 3¹⁴ + 6⁸ + 2¹¹ + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6743629) 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, 21320 + ... + 21633.

It is an arithmetic number, because the mean of its divisors is an integer number (1696683).

Almost surely, 2^6743621 is an apocalyptic number.

It is an amenable number.

6743621 is a deficient number, since it is larger than the sum of its proper divisors (43111).

6743621 is a wasteful number, since it uses less digits than its factorization.

6743621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43110.

The product of its digits is 6048, while the sum is 29.

The square root of 6743621 is about 2596.8482820527. The cubic root of 6743621 is about 188.9286051178.

The spelling of 6743621 in words is "six million, seven hundred forty-three thousand, six hundred twenty-one".