1712921 has 4 divisors (see below), whose sum is σ = 1957632. Its totient is φ = 1468212.

The previous prime is 1712917. The next prime is 1712927. The reversal of 1712921 is 1292171.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1712921 - 2² = 1712917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1712927) 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, 122345 + ... + 122358.

It is an arithmetic number, because the mean of its divisors is an integer number (489408).

2^1712921 is an apocalyptic number.

It is an amenable number.

1712921 is a deficient number, since it is larger than the sum of its proper divisors (244711).

1712921 is an equidigital number, since it uses as much as digits as its factorization.

1712921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244710.

The product of its digits is 252, while the sum is 23.

The square root of 1712921 is about 1308.7860787768. The cubic root of 1712921 is about 119.6499288186.

The spelling of 1712921 in words is "one million, seven hundred twelve thousand, nine hundred twenty-one".