705248021 has 8 divisors (see below), whose sum is σ = 712476000. Its totient is φ = 698032048.

The previous prime is 705247999. The next prime is 705248039. The reversal of 705248021 is 120842507.

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

It is not a de Polignac number, because 705248021 - 2⁶ = 705247957 is a prime.

It is a super-2 number, since 2×705248021² = 994749542248832882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705248081) 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 7 ways as a sum of consecutive naturals, for example, 158195 + ... + 162591.

It is an arithmetic number, because the mean of its divisors is an integer number (89059500).

Almost surely, 2^705248021 is an apocalyptic number.

It is an amenable number.

705248021 is a deficient number, since it is larger than the sum of its proper divisors (7227979).

705248021 is a wasteful number, since it uses less digits than its factorization.

705248021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6003.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 705248021 is about 26556.5061896327. The cubic root of 705248021 is about 890.1174027676.

The spelling of 705248021 in words is "seven hundred five million, two hundred forty-eight thousand, twenty-one".