670215 has 32 divisors (see below), whose sum is σ = 1322496. Its totient is φ = 282240.

The previous prime is 670211. The next prime is 670217. The reversal of 670215 is 512076.

It is not a de Polignac number, because 670215 - 2² = 670211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 670191 and 670200.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 670215.

It is not an unprimeable number, because it can be changed into a prime (670211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1120 + ... + 1610.

It is an arithmetic number, because the mean of its divisors is an integer number (41328).

2⁶⁷⁰²¹⁵ is an apocalyptic number.

670215 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

670215 is a deficient number, since it is larger than the sum of its proper divisors (652281).

670215 is a wasteful number, since it uses less digits than its factorization.

670215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 670215 is about 818.6665988056. Note that the first 3 decimals coincide. The cubic root of 670215 is about 87.5127600439.

The spelling of 670215 in words is "six hundred seventy thousand, two hundred fifteen".