1972427 has 4 divisors (see below), whose sum is σ = 1977360. Its totient is φ = 1967496.

The previous prime is 1972423. The next prime is 1972441. The reversal of 1972427 is 7242791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1972427 - 2² = 1972423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1972393 and 1972402.

It is not an unprimeable number, because it can be changed into a prime (1972423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1808 + ... + 2685.

It is an arithmetic number, because the mean of its divisors is an integer number (494340).

2^1972427 is an apocalyptic number.

1972427 is a deficient number, since it is larger than the sum of its proper divisors (4933).

1972427 is an equidigital number, since it uses as much as digits as its factorization.

1972427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4932.

The product of its digits is 7056, while the sum is 32.

The square root of 1972427 is about 1404.4312015902. The cubic root of 1972427 is about 125.4104269230.

The spelling of 1972427 in words is "one million, nine hundred seventy-two thousand, four hundred twenty-seven".