704250021 has 16 divisors (see below), whose sum is σ = 963247104. Its totient is φ = 457465584.

The previous prime is 704250011. The next prime is 704250023. The reversal of 704250021 is 120052407.

It is not a de Polignac number, because 704250021 - 2¹⁰ = 704248997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 704250021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (704250023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21006 + ... + 43008.

It is an arithmetic number, because the mean of its divisors is an integer number (60202944).

Almost surely, 2^704250021 is an apocalyptic number.

It is an amenable number.

704250021 is a deficient number, since it is larger than the sum of its proper divisors (258997083).

704250021 is a wasteful number, since it uses less digits than its factorization.

704250021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22280.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 704250021 is about 26537.7094150946. The cubic root of 704250021 is about 889.6973346964.

The spelling of 704250021 in words is "seven hundred four million, two hundred fifty thousand, twenty-one".