1972417 has 2 divisors, whose sum is σ = 1972418. Its totient is φ = 1972416.

The previous prime is 1972381. The next prime is 1972423. The reversal of 1972417 is 7142791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1648656 + 323761 = 1284^2 + 569^2 .

It is an emirp because it is prime and its reverse (7142791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1972417 - 2¹¹ = 1970369 is a prime.

It is a Chen prime.

1972417 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1972717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986208 + 986209.

It is an arithmetic number, because the mean of its divisors is an integer number (986209).

2^1972417 is an apocalyptic number.

It is an amenable number.

1972417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972417 is an equidigital number, since it uses as much as digits as its factorization.

1972417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 31.

The square root of 1972417 is about 1404.4276414255. The cubic root of 1972417 is about 125.4102149834.

The spelling of 1972417 in words is "one million, nine hundred seventy-two thousand, four hundred seventeen".