1944457 has 2 divisors, whose sum is σ = 1944458. Its totient is φ = 1944456.

The previous prime is 1944401. The next prime is 1944469. The reversal of 1944457 is 7544491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1565001 + 379456 = 1251^2 + 616^2 .

It is an emirp because it is prime and its reverse (7544491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1944457 - 2⁷ = 1944329 is a prime.

1944457 is a lucky number.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (1944157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972228 + 972229.

It is an arithmetic number, because the mean of its divisors is an integer number (972229).

2^1944457 is an apocalyptic number.

It is an amenable number.

1944457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1944457 is an equidigital number, since it uses as much as digits as its factorization.

1944457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 34.

The square root of 1944457 is about 1394.4378795773. The cubic root of 1944457 is about 124.8148084348.

Adding to 1944457 its sum of digits (34), we get a palindrome (1944491).

It can be divided in two parts, 1944 and 457, that added together give a 4-th power (2401 = 7⁴).

The spelling of 1944457 in words is "one million, nine hundred forty-four thousand, four hundred fifty-seven".