1972791 has 12 divisors (see below), whose sum is σ = 2877160. Its totient is φ = 1302480.

The previous prime is 1972787. The next prime is 1972807.

1972791 = 164² + 165² + ... + 217².

1972791 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1972791 - 2² = 1972787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972721) 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, 25 + ... + 1986.

2^1972791 is an apocalyptic number.

1972791 is a deficient number, since it is larger than the sum of its proper divisors (904369).

1972791 is a wasteful number, since it uses less digits than its factorization.

1972791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126 (or 2123 counting only the distinct ones).

The product of its digits is 7938, while the sum is 36.

The square root of 1972791 is about 1404.5607854415. The cubic root of 1972791 is about 125.4181410383.

The spelling of 1972791 in words is "one million, nine hundred seventy-two thousand, seven hundred ninety-one".