1972166 has 8 divisors (see below), whose sum is σ = 3380880. Its totient is φ = 845208.

The previous prime is 1972147. The next prime is 1972169. The reversal of 1972166 is 6612791.

It is a happy number.

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

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972169) 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, 70421 + ... + 70448.

It is an arithmetic number, because the mean of its divisors is an integer number (422610).

2^1972166 is an apocalyptic number.

1972166 is a deficient number, since it is larger than the sum of its proper divisors (1408714).

1972166 is a wasteful number, since it uses less digits than its factorization.

1972166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140878.

The product of its digits is 4536, while the sum is 32.

The square root of 1972166 is about 1404.3382783361. The cubic root of 1972166 is about 125.4048950638.

The spelling of 1972166 in words is "one million, nine hundred seventy-two thousand, one hundred sixty-six".