6742021 has 8 divisors (see below), whose sum is σ = 7920864. Its totient is φ = 5657520.

The previous prime is 6742003. The next prime is 6742037. The reversal of 6742021 is 1202476.

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

It is not a de Polignac number, because 6742021 - 2¹⁵ = 6709253 is a prime.

It is a Duffinian number.

6742021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6741983 and 6742001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6742091) 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, 23431 + ... + 23716.

It is an arithmetic number, because the mean of its divisors is an integer number (990108).

Almost surely, 2^6742021 is an apocalyptic number.

It is an amenable number.

6742021 is a deficient number, since it is larger than the sum of its proper divisors (1178843).

6742021 is a wasteful number, since it uses less digits than its factorization.

6742021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47171.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 6742021 is about 2596.5401980328. The cubic root of 6742021 is about 188.9136621231.

Adding to 6742021 its reverse (1202476), we get a palindrome (7944497).

The spelling of 6742021 in words is "six million, seven hundred forty-two thousand, twenty-one".