1722471 has 4 divisors (see below), whose sum is σ = 2296632. Its totient is φ = 1148312.

The previous prime is 1722463. The next prime is 1722481. The reversal of 1722471 is 1742271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1742271 = 3 ⋅580757.

It is a cyclic number.

It is not a de Polignac number, because 1722471 - 2³ = 1722463 is a prime.

It is a super-3 number, since 3×1722471³ = 15331230421281279333, which contains 333 as substring.

It is a D-number.

1722471 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1722431) 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, 287076 + ... + 287081.

It is an arithmetic number, because the mean of its divisors is an integer number (574158).

2^1722471 is an apocalyptic number.

1722471 is a deficient number, since it is larger than the sum of its proper divisors (574161).

1722471 is an equidigital number, since it uses as much as digits as its factorization.

1722471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574160.

The product of its digits is 784, while the sum is 24.

The square root of 1722471 is about 1312.4294266741. The cubic root of 1722471 is about 119.8718771420.

The spelling of 1722471 in words is "one million, seven hundred twenty-two thousand, four hundred seventy-one".