1964257 has 4 divisors (see below), whose sum is σ = 2032020. Its totient is φ = 1896496.

The previous prime is 1964243. The next prime is 1964297. The reversal of 1964257 is 7524691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7524691 = 1069 ⋅7039.

It can be written as a sum of positive squares in 2 ways, for example, as 1147041 + 817216 = 1071^2 + 904^2 .

It is a cyclic number.

It is not a de Polignac number, because 1964257 - 2¹¹ = 1962209 is a prime.

It is a Duffinian number.

1964257 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1964297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33838 + ... + 33895.

It is an arithmetic number, because the mean of its divisors is an integer number (508005).

2^1964257 is an apocalyptic number.

It is an amenable number.

1964257 is a deficient number, since it is larger than the sum of its proper divisors (67763).

1964257 is an equidigital number, since it uses as much as digits as its factorization.

1964257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67762.

The product of its digits is 15120, while the sum is 34.

The square root of 1964257 is about 1401.5195325075. The cubic root of 1964257 is about 125.2370329058.

The spelling of 1964257 in words is "one million, nine hundred sixty-four thousand, two hundred fifty-seven".