1925609 has 4 divisors (see below), whose sum is σ = 2200704. Its totient is φ = 1650516.

The previous prime is 1925603. The next prime is 1925611. The reversal of 1925609 is 9065291.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9065291 = 59 ⋅153649.

It is a de Polignac number, because none of the positive numbers 2^k-1925609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1925603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137537 + ... + 137550.

It is an arithmetic number, because the mean of its divisors is an integer number (550176).

2^1925609 is an apocalyptic number.

It is an amenable number.

1925609 is a deficient number, since it is larger than the sum of its proper divisors (275095).

1925609 is an equidigital number, since it uses as much as digits as its factorization.

1925609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275094.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 1925609 is about 1387.6631435619. The cubic root of 1925609 is about 124.4102135926.

The spelling of 1925609 in words is "one million, nine hundred twenty-five thousand, six hundred nine".