1925406 has 72 divisors (see below), whose sum is σ = 5068440. Its totient is φ = 526176.

The previous prime is 1925393. The next prime is 1925431. The reversal of 1925406 is 6045291.

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 1925406.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 32605 + ... + 32663.

It is an arithmetic number, because the mean of its divisors is an integer number (70395).

2^1925406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1925406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2534220).

1925406 is an abundant number, since it is smaller than the sum of its proper divisors (3143034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1925406 is a wasteful number, since it uses less digits than its factorization.

1925406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1925406 is about 1387.5899970813. The cubic root of 1925406 is about 124.4058416146.

Subtracting 1925406 from its reverse (6045291), we obtain a triangular number (4119885 = T₂₈₇₀).

It can be divided in two parts, 19 and 25406, that added together give a triangular number (25425 = T₂₂₅).

The spelling of 1925406 in words is "one million, nine hundred twenty-five thousand, four hundred six".