662405 has 8 divisors (see below), whose sum is σ = 841752. Its totient is φ = 498688.

The previous prime is 662401. The next prime is 662407. The reversal of 662405 is 504266.

662405 = T₁₃₅ + T₁₃₆ + ... + T₁₈₅.

It can be written as a sum of positive squares in 4 ways, for example, as 329476 + 332929 = 574^2 + 577^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 662405 - 2² = 662401 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3812 + ... + 3981.

It is an arithmetic number, because the mean of its divisors is an integer number (105219).

2⁶⁶²⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

662405 is a deficient number, since it is larger than the sum of its proper divisors (179347).

662405 is a wasteful number, since it uses less digits than its factorization.

662405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7815.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 662405 is about 813.8826696767. The cubic root of 662405 is about 87.1715029767.

The spelling of 662405 in words is "six hundred sixty-two thousand, four hundred five".