1712421 has 22 divisors (see below), whose sum is σ = 2657190. Its totient is φ = 1102248.

The previous prime is 1712411. The next prime is 1712437. The reversal of 1712421 is 1242171.

It can be written as a sum of positive squares in only one way, i.e., 1476225 + 236196 = 1215^2 + 486^2 .

It is not a de Polignac number, because 1712421 - 2⁹ = 1711909 is a prime.

It is a nialpdrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 1712394 and 1712403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1712401) by changing a digit.

It is a polite number, since it can be written in 21 ways as a sum of consecutive naturals, for example, 59035 + ... + 59063.

2^1712421 is an apocalyptic number.

It is an amenable number.

1712421 is a deficient number, since it is larger than the sum of its proper divisors (944769).

1712421 is an frugal number, since it uses more digits than its factorization.

1712421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59 (or 32 counting only the distinct ones).

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

The square root of 1712421 is about 1308.5950481337. The cubic root of 1712421 is about 119.6382857857.

Adding to 1712421 its reverse (1242171), we get a palindrome (2954592).

The spelling of 1712421 in words is "one million, seven hundred twelve thousand, four hundred twenty-one".