1621264 has 20 divisors (see below), whose sum is σ = 3173904. Its totient is φ = 802208.

The previous prime is 1621259. The next prime is 1621283. The reversal of 1621264 is 4621261.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1239 + ... + 2185.

2^1621264 is an apocalyptic number.

It is an amenable number.

1621264 is a deficient number, since it is larger than the sum of its proper divisors (1552640).

1621264 is a wasteful number, since it uses less digits than its factorization.

1621264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062 (or 1056 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 1621264 is about 1273.2886554116. The cubic root of 1621264 is about 117.4765669281.

The spelling of 1621264 in words is "one million, six hundred twenty-one thousand, two hundred sixty-four".