1972667 has 4 divisors (see below), whose sum is σ = 2040720. Its totient is φ = 1904616.

The previous prime is 1972657. The next prime is 1972669. The reversal of 1972667 is 7662791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7662791 = 283 ⋅27077.

It is a cyclic number.

It is not a de Polignac number, because 1972667 - 2⁴ = 1972651 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 1972667.

It is not an unprimeable number, because it can be changed into a prime (1972669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33983 + ... + 34040.

It is an arithmetic number, because the mean of its divisors is an integer number (510180).

2^1972667 is an apocalyptic number.

1972667 is a deficient number, since it is larger than the sum of its proper divisors (68053).

1972667 is an equidigital number, since it uses as much as digits as its factorization.

1972667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68052.

The product of its digits is 31752, while the sum is 38.

The square root of 1972667 is about 1404.5166428348. The cubic root of 1972667 is about 125.4155132594.

The spelling of 1972667 in words is "one million, nine hundred seventy-two thousand, six hundred sixty-seven".