1964421 has 12 divisors (see below), whose sum is σ = 2856672. Its totient is φ = 1300776.

The previous prime is 1964419. The next prime is 1964437. The reversal of 1964421 is 1244691.

1964421 is a `hidden beast` number, since 19 + 644 + 2 + 1 = 666.

It is not a de Polignac number, because 1964421 - 2¹ = 1964419 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1964411) 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 11 ways as a sum of consecutive naturals, for example, 850 + ... + 2156.

It is an arithmetic number, because the mean of its divisors is an integer number (238056).

2^1964421 is an apocalyptic number.

It is an amenable number.

1964421 is a deficient number, since it is larger than the sum of its proper divisors (892251).

1964421 is a wasteful number, since it uses less digits than its factorization.

1964421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480 (or 1477 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1964421 is about 1401.5780392115. The cubic root of 1964421 is about 125.2405182443.

The spelling of 1964421 in words is "one million, nine hundred sixty-four thousand, four hundred twenty-one".