1607221 has 8 divisors (see below), whose sum is σ = 2003904. Its totient is φ = 1252320.

The previous prime is 1607201. The next prime is 1607233. The reversal of 1607221 is 1227061.

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 1607221 - 2¹¹ = 1605173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1607201) 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, 10360 + ... + 10513.

It is an arithmetic number, because the mean of its divisors is an integer number (250488).

2^1607221 is an apocalyptic number.

1607221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1607221 is a deficient number, since it is larger than the sum of its proper divisors (396683).

1607221 is a wasteful number, since it uses less digits than its factorization.

1607221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20891.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 1607221 is about 1267.7622016766. The cubic root of 1607221 is about 117.1363982587.

It can be divided in two parts, 160 and 7221, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 1607221 in words is "one million, six hundred seven thousand, two hundred twenty-one".