1010000405 has 4 divisors (see below), whose sum is σ = 1212000492. Its totient is φ = 808000320.

The previous prime is 1010000401. The next prime is 1010000417. The reversal of 1010000405 is 5040000101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 263672644 + 746327761 = 16238^2 + 27319^2 .

It is not a de Polignac number, because 1010000405 - 2² = 1010000401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010000401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101000036 + ... + 101000045.

It is an arithmetic number, because the mean of its divisors is an integer number (303000123).

Almost surely, 2^1010000405 is an apocalyptic number.

It is an amenable number.

1010000405 is a deficient number, since it is larger than the sum of its proper divisors (202000087).

1010000405 is an equidigital number, since it uses as much as digits as its factorization.

1010000405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202000086.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 1010000405 is about 31780.5035359731. The cubic root of 1010000405 is about 1003.3224176495.

Adding to 1010000405 its reverse (5040000101), we get a palindrome (6050000506).

The spelling of 1010000405 in words is "one billion, ten million, four hundred five", and thus it is an aban number.