1628131 has 2 divisors, whose sum is σ = 1628132. Its totient is φ = 1628130.

The previous prime is 1628117. The next prime is 1628149. The reversal of 1628131 is 1318261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1628131 - 2¹¹ = 1626083 is a prime.

It is a super-2 number, since 2×1628131² = 5301621106322, which contains 22 as substring.

It is an Ulam number.

1628131 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1628161) 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 as a sum of consecutive naturals, namely, 814065 + 814066.

It is an arithmetic number, because the mean of its divisors is an integer number (814066).

2^1628131 is an apocalyptic number.

1628131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1628131 is an equidigital number, since it uses as much as digits as its factorization.

1628131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 22.

The square root of 1628131 is about 1275.9823666493. The cubic root of 1628131 is about 117.6421939312.

The spelling of 1628131 in words is "one million, six hundred twenty-eight thousand, one hundred thirty-one".