1964557 has 6 divisors (see below), whose sum is σ = 2285358. Its totient is φ = 1683864.

The previous prime is 1964549. The next prime is 1964561. The reversal of 1964557 is 7554691.

It can be written as a sum of positive squares in only one way, i.e., 1223236 + 741321 = 1106^2 + 861^2 .

It is not a de Polignac number, because 1964557 - 2³ = 1964549 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 (1964857) 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 5 ways as a sum of consecutive naturals, for example, 19998 + ... + 20095.

It is an arithmetic number, because the mean of its divisors is an integer number (380893).

2^1964557 is an apocalyptic number.

It is an amenable number.

1964557 is a deficient number, since it is larger than the sum of its proper divisors (320801).

1964557 is an equidigital number, since it uses as much as digits as its factorization.

1964557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40107 (or 40100 counting only the distinct ones).

The product of its digits is 37800, while the sum is 37.

The square root of 1964557 is about 1401.6265551137. The cubic root of 1964557 is about 125.2434083779.

It can be divided in two parts, 196 and 4557, that added together give a triangular number (4753 = T₉₇).

The spelling of 1964557 in words is "one million, nine hundred sixty-four thousand, five hundred fifty-seven".