1961871 has 8 divisors (see below), whose sum is σ = 2647680. Its totient is φ = 1291992.

The previous prime is 1961863. The next prime is 1961873. The reversal of 1961871 is 1781691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1961871 - 2³ = 1961863 is a prime.

1961871 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3691 + ... + 4188.

It is an arithmetic number, because the mean of its divisors is an integer number (330960).

2^1961871 is an apocalyptic number.

1961871 is a deficient number, since it is larger than the sum of its proper divisors (685809).

1961871 is an equidigital number, since it uses as much as digits as its factorization.

1961871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7965.

The product of its digits is 3024, while the sum is 33.

The square root of 1961871 is about 1400.6680548938. The cubic root of 1961871 is about 125.1863035234.

The spelling of 1961871 in words is "one million, nine hundred sixty-one thousand, eight hundred seventy-one".