739921 has 16 divisors (see below), whose sum is σ = 935424. Its totient is φ = 569664.

The previous prime is 739909. The next prime is 739931. The reversal of 739921 is 129937.

It is a cyclic number.

It is not a de Polignac number, because 739921 - 2¹¹ = 737873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (739931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4191 + ... + 4363.

It is an arithmetic number, because the mean of its divisors is an integer number (58464).

2⁷³⁹⁹²¹ is an apocalyptic number.

It is an amenable number.

739921 is a deficient number, since it is larger than the sum of its proper divisors (195503).

739921 is a wasteful number, since it uses less digits than its factorization.

739921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240.

The product of its digits is 3402, while the sum is 31.

The square root of 739921 is about 860.1866076614. The cubic root of 739921 is about 90.4471981195.

The spelling of 739921 in words is "seven hundred thirty-nine thousand, nine hundred twenty-one".