1906426 has 8 divisors (see below), whose sum is σ = 2871540. Its totient is φ = 949248.

The previous prime is 1906417. The next prime is 1906439. The reversal of 1906426 is 6246091.

It can be written as a sum of positive squares in 2 ways, for example, as 1825201 + 81225 = 1351^2 + 285^2 .

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 = 1906394 and 1906403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1341 + ... + 2368.

2^1906426 is an apocalyptic number.

1906426 is a deficient number, since it is larger than the sum of its proper divisors (965114).

1906426 is a wasteful number, since it uses less digits than its factorization.

1906426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3968.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1906426 is about 1380.7338628425. The cubic root of 1906426 is about 123.9957074477.

It can be divided in two parts, 1906 and 426, that added together give a palindrome (2332).

The spelling of 1906426 in words is "one million, nine hundred six thousand, four hundred twenty-six".