1405000001 has 4 divisors (see below), whose sum is σ = 1442973012. Its totient is φ = 1367026992.

The previous prime is 1404999997. The next prime is 1405000027. The reversal of 1405000001 is 1000005041.

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 538286401 + 866713600 = 23201^2 + 29440^2 .

It is a cyclic number.

It is not a de Polignac number, because 1405000001 - 2² = 1404999997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1405000061) 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, 18986450 + ... + 18986523.

It is an arithmetic number, because the mean of its divisors is an integer number (360743253).

Almost surely, 2^1405000001 is an apocalyptic number.

It is an amenable number.

1405000001 is a deficient number, since it is larger than the sum of its proper divisors (37973011).

1405000001 is an equidigital number, since it uses as much as digits as its factorization.

1405000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37973010.

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

The square root of 1405000001 is about 37483.3296413219. The cubic root of 1405000001 is about 1120.0191325920.

Adding to 1405000001 its reverse (1000005041), we get a palindrome (2405005042).

The spelling of 1405000001 in words is "one billion, four hundred five million, one", and thus it is an aban number.