1662231 has 4 divisors (see below), whose sum is σ = 2216312. Its totient is φ = 1108152.

The previous prime is 1662229. The next prime is 1662257. The reversal of 1662231 is 1322661.

It is a happy number.

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

It is not a de Polignac number, because 1662231 - 2¹ = 1662229 is a prime.

It is a super-2 number, since 2×1662231² = 5526023794722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1662198 and 1662207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277036 + ... + 277041.

It is an arithmetic number, because the mean of its divisors is an integer number (554078).

2^1662231 is an apocalyptic number.

1662231 is a deficient number, since it is larger than the sum of its proper divisors (554081).

1662231 is an equidigital number, since it uses as much as digits as its factorization.

1662231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554080.

The product of its digits is 432, while the sum is 21.

The square root of 1662231 is about 1289.2753778770. The cubic root of 1662231 is about 118.4578354145.

Adding to 1662231 its reverse (1322661), we get a palindrome (2984892).

It can be divided in two parts, 16622 and 31, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 1662231 in words is "one million, six hundred sixty-two thousand, two hundred thirty-one".