1964521 has 8 divisors (see below), whose sum is σ = 2126600. Its totient is φ = 1804032.

The previous prime is 1964483. The next prime is 1964531. The reversal of 1964521 is 1254691.

It can be written as a sum of positive squares in 4 ways, for example, as 18496 + 1946025 = 136^2 + 1395^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1964521 - 2⁹ = 1964009 is a prime.

It is a Duffinian number.

1964521 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1964521.

It is not an unprimeable number, because it can be changed into a prime (1964531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4321 + ... + 4753.

It is an arithmetic number, because the mean of its divisors is an integer number (265825).

2^1964521 is an apocalyptic number.

It is an amenable number.

1964521 is a deficient number, since it is larger than the sum of its proper divisors (162079).

1964521 is a wasteful number, since it uses less digits than its factorization.

1964521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795.

The product of its digits is 2160, while the sum is 28.

The square root of 1964521 is about 1401.6137128325. The cubic root of 1964521 is about 125.2426433555.

It can be divided in two parts, 1964 and 521, that added together give a triangular number (2485 = T₇₀).

The spelling of 1964521 in words is "one million, nine hundred sixty-four thousand, five hundred twenty-one".