6762421 has 4 divisors (see below), whose sum is σ = 6781932. Its totient is φ = 6742912.

The previous prime is 6762373. The next prime is 6762439. The reversal of 6762421 is 1242676.

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 1188100 + 5574321 = 1090^2 + 2361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6762421 is a prime.

It is a super-3 number, since 3×6762421³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

6762421 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6762421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6762491) 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, 9226 + ... + 9931.

It is an arithmetic number, because the mean of its divisors is an integer number (1695483).

Almost surely, 2^6762421 is an apocalyptic number.

It is an amenable number.

6762421 is a deficient number, since it is larger than the sum of its proper divisors (19511).

6762421 is a wasteful number, since it uses less digits than its factorization.

6762421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19510.

The product of its digits is 4032, while the sum is 28.

The square root of 6762421 is about 2600.4655352456. The cubic root of 6762421 is about 189.1040085216.

The spelling of 6762421 in words is "six million, seven hundred sixty-two thousand, four hundred twenty-one".