1722461 has 8 divisors (see below), whose sum is σ = 1905624. Its totient is φ = 1546560.

The previous prime is 1722449. The next prime is 1722463. The reversal of 1722461 is 1642271.

It can be written as a sum of positive squares in 4 ways, for example, as 630436 + 1092025 = 794^2 + 1045^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1722461 - 2¹⁴ = 1706077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1722463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1310 + ... + 2271.

It is an arithmetic number, because the mean of its divisors is an integer number (238203).

2^1722461 is an apocalyptic number.

It is an amenable number.

1722461 is a deficient number, since it is larger than the sum of its proper divisors (183163).

1722461 is a wasteful number, since it uses less digits than its factorization.

1722461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3631.

The product of its digits is 672, while the sum is 23.

The square root of 1722461 is about 1312.4256169399. The cubic root of 1722461 is about 119.8716451650.

The spelling of 1722461 in words is "one million, seven hundred twenty-two thousand, four hundred sixty-one".