70405 has 4 divisors (see below), whose sum is σ = 84492. Its totient is φ = 56320.

The previous prime is 70393. The next prime is 70423. The reversal of 70405 is 50407.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42849 + 27556 = 207^2 + 166^2 .

It is not a de Polignac number, because 70405 - 2⁵ = 70373 is a prime.

It is a Duffinian number.

70405 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7036 + ... + 7045.

It is an arithmetic number, because the mean of its divisors is an integer number (21123).

2⁷⁰⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

70405 is a deficient number, since it is larger than the sum of its proper divisors (14087).

70405 is a wasteful number, since it uses less digits than its factorization.

70405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14086.

The product of its (nonzero) digits is 140, while the sum is 16.

The square root of 70405 is about 265.3394052907. The cubic root of 70405 is about 41.2921821331.

The spelling of 70405 in words is "seventy thousand, four hundred five".