6149721 has 8 divisors (see below), whose sum is σ = 8264704. Its totient is φ = 4067280.

The previous prime is 6149707. The next prime is 6149723. The reversal of 6149721 is 1279416.

It is a happy number.

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

It is not a de Polignac number, because 6149721 - 2¹⁵ = 6116953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6149723) 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, 7690 + ... + 8451.

It is an arithmetic number, because the mean of its divisors is an integer number (1033088).

Almost surely, 2^6149721 is an apocalyptic number.

It is an amenable number.

6149721 is a deficient number, since it is larger than the sum of its proper divisors (2114983).

6149721 is a wasteful number, since it uses less digits than its factorization.

6149721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16271.

The product of its digits is 3024, while the sum is 30.

The square root of 6149721 is about 2479.8631010602. The cubic root of 6149721 is about 183.2111093515.

The spelling of 6149721 in words is "six million, one hundred forty-nine thousand, seven hundred twenty-one".