1906546 has 4 divisors (see below), whose sum is σ = 2859822. Its totient is φ = 953272.

The previous prime is 1906543. The next prime is 1906559. The reversal of 1906546 is 6456091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6456091 = 31 ⋅208261.

It can be written as a sum of positive squares in only one way, i.e., 1661521 + 245025 = 1289^2 + 495^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1906543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 476635 + ... + 476638.

2^1906546 is an apocalyptic number.

1906546 is a deficient number, since it is larger than the sum of its proper divisors (953276).

1906546 is an equidigital number, since it uses as much as digits as its factorization.

1906546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953275.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1906546 is about 1380.7773173108. Note that the first 3 decimals coincide. The cubic root of 1906546 is about 123.9983090300.

The spelling of 1906546 in words is "one million, nine hundred six thousand, five hundred forty-six".