1925942871 has 4 divisors (see below), whose sum is σ = 2567923832. Its totient is φ = 1283961912.

The previous prime is 1925942861. The next prime is 1925942911. The reversal of 1925942871 is 1782495291.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1782495291 = 3 ⋅594165097.

It is not a de Polignac number, because 1925942871 - 2⁵ = 1925942839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1925942871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1925942861) 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, 320990476 + ... + 320990481.

It is an arithmetic number, because the mean of its divisors is an integer number (641980958).

Almost surely, 2^1925942871 is an apocalyptic number.

1925942871 is a deficient number, since it is larger than the sum of its proper divisors (641980961).

1925942871 is an equidigital number, since it uses as much as digits as its factorization.

1925942871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641980960.

The product of its digits is 362880, while the sum is 48.

The square root of 1925942871 is about 43885.5656338163. The cubic root of 1925942871 is about 1244.1740344995.

The spelling of 1925942871 in words is "one billion, nine hundred twenty-five million, nine hundred forty-two thousand, eight hundred seventy-one".