705406 has 12 divisors (see below), whose sum is σ = 1146312. Its totient is φ = 325416.

The previous prime is 705403. The next prime is 705409. The reversal of 705406 is 604507.

705406 = 90² + 91² + ... + 141².

It is an interprime number because it is at equal distance from previous prime (705403) and next prime (705409).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 706 + ... + 1381.

It is an arithmetic number, because the mean of its divisors is an integer number (95526).

2⁷⁰⁵⁴⁰⁶ is an apocalyptic number.

705406 is a deficient number, since it is larger than the sum of its proper divisors (440906).

705406 is a wasteful number, since it uses less digits than its factorization.

705406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2115 (or 2102 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 705406 is about 839.8845158711. The cubic root of 705406 is about 89.0183861354.

It can be divided in two parts, 705 and 406, that added together give a palindrome (1111).

The spelling of 705406 in words is "seven hundred five thousand, four hundred six".