1964542 has 4 divisors (see below), whose sum is σ = 2946816. Its totient is φ = 982270.

The previous prime is 1964531. The next prime is 1964549. The reversal of 1964542 is 2454691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2454691 = 37 ⋅66343.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1964549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491134 + ... + 491137.

It is an arithmetic number, because the mean of its divisors is an integer number (736704).

2^1964542 is an apocalyptic number.

1964542 is a deficient number, since it is larger than the sum of its proper divisors (982274).

1964542 is an equidigital number, since it uses as much as digits as its factorization.

1964542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982273.

The product of its digits is 8640, while the sum is 31.

The square root of 1964542 is about 1401.6212041775. The cubic root of 1964542 is about 125.2430896197.

The spelling of 1964542 in words is "one million, nine hundred sixty-four thousand, five hundred forty-two".