1906625 has 16 divisors (see below), whose sum is σ = 2720640. Its totient is φ = 1306800.

The previous prime is 1906621. The next prime is 1906627. The reversal of 1906625 is 5266091.

It is a Cunningham number, because it is equal to 124³+1.

It is not a de Polignac number, because 1906625 - 2² = 1906621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1906621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215 + ... + 1964.

It is an arithmetic number, because the mean of its divisors is an integer number (170040).

2^1906625 is an apocalyptic number.

It is an amenable number.

1906625 is a deficient number, since it is larger than the sum of its proper divisors (814015).

1906625 is an equidigital number, since it uses as much as digits as its factorization.

1906625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2201 (or 2191 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 1906625 is about 1380.8059240893. The cubic root of 1906625 is about 124.0000216788. Note that the first 4 decimals are identical.

It can be divided in two parts, 19066 and 25, that added together give a palindrome (19091).

The spelling of 1906625 in words is "one million, nine hundred six thousand, six hundred twenty-five".