1040021445 has 16 divisors (see below), whose sum is σ = 1676740032. Its totient is φ = 550442880.

The previous prime is 1040021443. The next prime is 1040021459. The reversal of 1040021445 is 5441200401.

It is a happy number.

It is not a de Polignac number, because 1040021445 - 2¹ = 1040021443 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040021441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262672 + ... + 266601.

It is an arithmetic number, because the mean of its divisors is an integer number (104796252).

Almost surely, 2^1040021445 is an apocalyptic number.

1040021445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1040021445 is a deficient number, since it is larger than the sum of its proper divisors (636718587).

1040021445 is a wasteful number, since it uses less digits than its factorization.

1040021445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529412.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1040021445 is about 32249.3634820906. The cubic root of 1040021445 is about 1013.1663676196.

Adding to 1040021445 its reverse (5441200401), we get a palindrome (6481221846).

The spelling of 1040021445 in words is "one billion, forty million, twenty-one thousand, four hundred forty-five".