1045640 has 16 divisors (see below), whose sum is σ = 2352780. Its totient is φ = 418240.

The previous prime is 1045633. The next prime is 1045643. The reversal of 1045640 is 465401.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1044484 + 1156 = 1022^2 + 34^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (1045643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13031 + ... + 13110.

2^1045640 is an apocalyptic number.

1045640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1045640 is an abundant number, since it is smaller than the sum of its proper divisors (1307140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1045640 is a wasteful number, since it uses less digits than its factorization.

1045640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26152 (or 26148 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1045640 is about 1022.5654013314. The cubic root of 1045640 is about 101.4987583467.

The spelling of 1045640 in words is "one million, forty-five thousand, six hundred forty".