705551 has 24 divisors (see below), whose sum is σ = 957600. Its totient is φ = 517440.

The previous prime is 705533. The next prime is 705559. The reversal of 705551 is 155507.

It is not a de Polignac number, because 705551 - 2¹⁰ = 704527 is a prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41495 + ... + 41511.

It is an arithmetic number, because the mean of its divisors is an integer number (39900).

2⁷⁰⁵⁵⁵¹ is an apocalyptic number.

705551 is the 686-th pentagonal number.

705551 is a deficient number, since it is larger than the sum of its proper divisors (252049).

705551 is a wasteful number, since it uses less digits than its factorization.

705551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60 (or 35 counting only the distinct ones).

The product of its (nonzero) digits is 875, while the sum is 23.

The square root of 705551 is about 839.9708328270. The cubic root of 705551 is about 89.0244851203.

The spelling of 705551 in words is "seven hundred five thousand, five hundred fifty-one".