662139 has 6 divisors (see below), whose sum is σ = 956436. Its totient is φ = 441420.

The previous prime is 662111. The next prime is 662141. The reversal of 662139 is 931266.

It is a happy number.

662139 is a `hidden beast` number, since 6 + 621 + 39 = 666.

It is not a de Polignac number, because 662139 - 2⁵ = 662107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (662149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36777 + ... + 36794.

It is an arithmetic number, because the mean of its divisors is an integer number (159406).

2⁶⁶²¹³⁹ is an apocalyptic number.

662139 is a deficient number, since it is larger than the sum of its proper divisors (294297).

662139 is a wasteful number, since it uses less digits than its factorization.

662139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73577 (or 73574 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 662139 is about 813.7192390499. The cubic root of 662139 is about 87.1598330143.

The spelling of 662139 in words is "six hundred sixty-two thousand, one hundred thirty-nine".