1911425 has 12 divisors (see below), whose sum is σ = 2396796. Its totient is φ = 1512000.

The previous prime is 1911401. The next prime is 1911433. The reversal of 1911425 is 5241191.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 83521 + 1827904 = 289^2 + 1352^2 .

It is not a de Polignac number, because 1911425 - 2¹⁰ = 1910401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1911425.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2147 + ... + 2903.

It is an arithmetic number, because the mean of its divisors is an integer number (199733).

2^1911425 is an apocalyptic number.

It is an amenable number.

1911425 is a deficient number, since it is larger than the sum of its proper divisors (485371).

1911425 is a wasteful number, since it uses less digits than its factorization.

1911425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868 (or 863 counting only the distinct ones).

The product of its digits is 360, while the sum is 23.

The square root of 1911425 is about 1382.5429468917. The cubic root of 1911425 is about 124.1039927135.

It can be divided in two parts, 1911 and 425, that multiplied together give a triangular number (812175 = T₁₂₇₄).

The spelling of 1911425 in words is "one million, nine hundred eleven thousand, four hundred twenty-five".