1957871 has 2 divisors, whose sum is σ = 1957872. Its totient is φ = 1957870.

The previous prime is 1957861. The next prime is 1957903. The reversal of 1957871 is 1787591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1957871 - 2¹⁰ = 1956847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1957801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978935 + 978936.

It is an arithmetic number, because the mean of its divisors is an integer number (978936).

2^1957871 is an apocalyptic number.

1957871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1957871 is an equidigital number, since it uses as much as digits as its factorization.

1957871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 38.

The square root of 1957871 is about 1399.2394362653. The cubic root of 1957871 is about 125.1011661013.

The spelling of 1957871 in words is "one million, nine hundred fifty-seven thousand, eight hundred seventy-one".