1722961 has 4 divisors (see below), whose sum is σ = 1726272. Its totient is φ = 1719652.

The previous prime is 1722937. The next prime is 1722983. The reversal of 1722961 is 1692271.

It is a happy number.

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 1722961 - 2⁹ = 1722449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1722991) 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, 685 + ... + 1978.

It is an arithmetic number, because the mean of its divisors is an integer number (431568).

2^1722961 is an apocalyptic number.

It is an amenable number.

1722961 is a deficient number, since it is larger than the sum of its proper divisors (3311).

1722961 is an equidigital number, since it uses as much as digits as its factorization.

1722961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3310.

The product of its digits is 1512, while the sum is 28.

The square root of 1722961 is about 1312.6160901040. The cubic root of 1722961 is about 119.8832429165.

The spelling of 1722961 in words is "one million, seven hundred twenty-two thousand, nine hundred sixty-one".