1906573 has 6 divisors (see below), whose sum is σ = 1966766. Its totient is φ = 1846872.

The previous prime is 1906559. The next prime is 1906579. The reversal of 1906573 is 3756091.

It can be written as a sum of positive squares in only one way, i.e., 1855044 + 51529 = 1362^2 + 227^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1906573 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1906579) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8286 + ... + 8512.

2^1906573 is an apocalyptic number.

It is an amenable number.

1906573 is a deficient number, since it is larger than the sum of its proper divisors (60193).

1906573 is an frugal number, since it uses more digits than its factorization.

1906573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 1906573 is about 1380.7870943777. The cubic root of 1906573 is about 123.9988943710.

The spelling of 1906573 in words is "one million, nine hundred six thousand, five hundred seventy-three".