1081642 has 16 divisors (see below), whose sum is σ = 1778760. Its totient is φ = 491008.

The previous prime is 1081637. The next prime is 1081657. The reversal of 1081642 is 2461801.

It can be written as a sum of positive squares in 4 ways, for example, as 958441 + 123201 = 979^2 + 351^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438 + ... + 1534.

2^1081642 is an apocalyptic number.

1081642 is a deficient number, since it is larger than the sum of its proper divisors (697118).

1081642 is a wasteful number, since it uses less digits than its factorization.

1081642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1081642 is about 1040.0201921117. The cubic root of 1081642 is about 102.6505264071.

The spelling of 1081642 in words is "one million, eighty-one thousand, six hundred forty-two".