1628121 has 16 divisors (see below), whose sum is σ = 2396160. Its totient is φ = 975120.

The previous prime is 1628117. The next prime is 1628131. The reversal of 1628121 is 1218261.

It is not a de Polignac number, because 1628121 - 2² = 1628117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1628131) 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 15 ways as a sum of consecutive naturals, for example, 3160 + ... + 3638.

It is an arithmetic number, because the mean of its divisors is an integer number (149760).

2^1628121 is an apocalyptic number.

1628121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1628121 is a deficient number, since it is larger than the sum of its proper divisors (768039).

1628121 is a wasteful number, since it uses less digits than its factorization.

1628121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596.

The product of its digits is 192, while the sum is 21.

The square root of 1628121 is about 1275.9784480939. The cubic root of 1628121 is about 117.6419530774.

The spelling of 1628121 in words is "one million, six hundred twenty-eight thousand, one hundred twenty-one".