1972771 has 4 divisors (see below), whose sum is σ = 1984752. Its totient is φ = 1960792.

The previous prime is 1972741. The next prime is 1972777. The reversal of 1972771 is 1772791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1772791 = 89 ⋅19919.

It is a cyclic number.

It is not a de Polignac number, because 1972771 - 2⁵ = 1972739 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1972777) 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, 5740 + ... + 6073.

It is an arithmetic number, because the mean of its divisors is an integer number (496188).

2^1972771 is an apocalyptic number.

1972771 is a deficient number, since it is larger than the sum of its proper divisors (11981).

1972771 is a wasteful number, since it uses less digits than its factorization.

1972771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11980.

The product of its digits is 6174, while the sum is 34.

The square root of 1972771 is about 1404.5536657601. The cubic root of 1972771 is about 125.4177172104.

The spelling of 1972771 in words is "one million, nine hundred seventy-two thousand, seven hundred seventy-one".