1721214 has 24 divisors (see below), whose sum is σ = 4068792. Its totient is φ = 521520.

The previous prime is 1721201. The next prime is 1721227. The reversal of 1721214 is 4121271.

It is an interprime number because it is at equal distance from previous prime (1721201) and next prime (1721227).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4149 + ... + 4544.

It is an arithmetic number, because the mean of its divisors is an integer number (169533).

2^1721214 is an apocalyptic number.

1721214 is an abundant number, since it is smaller than the sum of its proper divisors (2347578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1721214 is a wasteful number, since it uses less digits than its factorization.

1721214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8712 (or 8709 counting only the distinct ones).

The product of its digits is 112, while the sum is 18.

The square root of 1721214 is about 1311.9504563816. The cubic root of 1721214 is about 119.8427105904.

Adding to 1721214 its reverse (4121271), we get a palindrome (5842485).

The spelling of 1721214 in words is "one million, seven hundred twenty-one thousand, two hundred fourteen".