6142721 has 8 divisors (see below), whose sum is σ = 6667584. Its totient is φ = 5625360.

The previous prime is 6142687. The next prime is 6142727. The reversal of 6142721 is 1272416.

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

It is a de Polignac number, because none of the positive numbers 2^k-6142721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6142727) 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, 101 + ... + 3506.

It is an arithmetic number, because the mean of its divisors is an integer number (833448).

Almost surely, 2^6142721 is an apocalyptic number.

It is an amenable number.

6142721 is a deficient number, since it is larger than the sum of its proper divisors (524863).

6142721 is a wasteful number, since it uses less digits than its factorization.

6142721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3751.

The product of its digits is 672, while the sum is 23.

The square root of 6142721 is about 2478.4513309726. The cubic root of 6142721 is about 183.1415688162.

The spelling of 6142721 in words is "six million, one hundred forty-two thousand, seven hundred twenty-one".