1925891 has 4 divisors (see below), whose sum is σ = 2100984. Its totient is φ = 1750800.

The previous prime is 1925881. The next prime is 1925899. The reversal of 1925891 is 1985291.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1925891 - 2⁶ = 1925827 is a prime.

It is a super-2 number, since 2×1925891² = 7418112287762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1925899) 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, 87530 + ... + 87551.

It is an arithmetic number, because the mean of its divisors is an integer number (525246).

2^1925891 is an apocalyptic number.

1925891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1925891 is a deficient number, since it is larger than the sum of its proper divisors (175093).

1925891 is a wasteful number, since it uses less digits than its factorization.

1925891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175092.

The product of its digits is 6480, while the sum is 35.

The square root of 1925891 is about 1387.7647495163. The cubic root of 1925891 is about 124.4162864710.

The spelling of 1925891 in words is "one million, nine hundred twenty-five thousand, eight hundred ninety-one".