1966371 has 12 divisors (see below), whose sum is σ = 2882376. Its totient is φ = 1191520.

The previous prime is 1966343. The next prime is 1966381. The reversal of 1966371 is 1736691.

It is not a de Polignac number, because 1966371 - 2¹⁰ = 1965347 is a prime.

It is a super-2 number, since 2×1966371² = 7733229819282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1966301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2346 + ... + 3071.

It is an arithmetic number, because the mean of its divisors is an integer number (240198).

2^1966371 is an apocalyptic number.

1966371 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1966371 is a deficient number, since it is larger than the sum of its proper divisors (916005).

1966371 is a wasteful number, since it uses less digits than its factorization.

1966371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5442 (or 5431 counting only the distinct ones).

The product of its digits is 6804, while the sum is 33.

The square root of 1966371 is about 1402.2735111240. The cubic root of 1966371 is about 125.2819449117.

The spelling of 1966371 in words is "one million, nine hundred sixty-six thousand, three hundred seventy-one".