704921 has 4 divisors (see below), whose sum is σ = 805632. Its totient is φ = 604212.

The previous prime is 704897. The next prime is 704929. The reversal of 704921 is 129407.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 129407 = 151 ⋅857.

It is not a de Polignac number, because 704921 - 2⁶ = 704857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (704929) 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, 50345 + ... + 50358.

It is an arithmetic number, because the mean of its divisors is an integer number (201408).

2⁷⁰⁴⁹²¹ is an apocalyptic number.

It is an amenable number.

704921 is a deficient number, since it is larger than the sum of its proper divisors (100711).

704921 is a wasteful number, since it uses less digits than its factorization.

704921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100710.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 704921 is about 839.5957360540. The cubic root of 704921 is about 88.9979800072.

The spelling of 704921 in words is "seven hundred four thousand, nine hundred twenty-one".