1591642 has 24 divisors (see below), whose sum is σ = 2747196. Its totient is φ = 688896.

The previous prime is 1591637. The next prime is 1591663. The reversal of 1591642 is 2461951.

It can be written as a sum of positive squares in 6 ways, for example, as 201601 + 1390041 = 449^2 + 1179^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1591642.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5608 + ... + 5884.

2^1591642 is an apocalyptic number.

1591642 is a deficient number, since it is larger than the sum of its proper divisors (1155554).

1591642 is a wasteful number, since it uses less digits than its factorization.

1591642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 309 counting only the distinct ones).

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

The square root of 1591642 is about 1261.6029486332. The cubic root of 1591642 is about 116.7566960411.

The spelling of 1591642 in words is "one million, five hundred ninety-one thousand, six hundred forty-two".