1901722 has 8 divisors (see below), whose sum is σ = 3020436. Its totient is φ = 894912.

The previous prime is 1901719. The next prime is 1901749. The reversal of 1901722 is 2271091.

It can be written as a sum of positive squares in 2 ways, for example, as 1901641 + 81 = 1379^2 + 9^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1901693 and 1901702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27933 + ... + 28000.

2^1901722 is an apocalyptic number.

1901722 is a deficient number, since it is larger than the sum of its proper divisors (1118714).

1901722 is a wasteful number, since it uses less digits than its factorization.

1901722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55952.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 1901722 is about 1379.0293687953. The cubic root of 1901722 is about 123.8936392845.

The spelling of 1901722 in words is "one million, nine hundred one thousand, seven hundred twenty-two".