6921742 has 8 divisors (see below), whose sum is σ = 10717632. Its totient is φ = 3349200.

The previous prime is 6921727. The next prime is 6921763. The reversal of 6921742 is 2471296.

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

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55759 + ... + 55882.

It is an arithmetic number, because the mean of its divisors is an integer number (1339704).

Almost surely, 2^6921742 is an apocalyptic number.

6921742 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

6921742 is a deficient number, since it is larger than the sum of its proper divisors (3795890).

6921742 is a wasteful number, since it uses less digits than its factorization.

6921742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111674.

The product of its digits is 6048, while the sum is 31.

The square root of 6921742 is about 2630.9203712769. The cubic root of 6921742 is about 190.5775776329.

The spelling of 6921742 in words is "six million, nine hundred twenty-one thousand, seven hundred forty-two".