1040400001 has 2 divisors, whose sum is σ = 1040400002. Its totient is φ = 1040400000.

The previous prime is 1040399977. The next prime is 1040400073. The reversal of 1040400001 is 1000040401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 579653776 + 460746225 = 24076^2 + 21465^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040400001 - 2⁹ = 1040399489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1040400401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520200000 + 520200001.

It is an arithmetic number, because the mean of its divisors is an integer number (520200001).

Almost surely, 2^1040400001 is an apocalyptic number.

It is an amenable number.

1040400001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040400001 is an equidigital number, since it uses as much as digits as its factorization.

1040400001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1040400001 is about 32255.2321492188. The cubic root of 1040400001 is about 1013.2892797268.

Adding to 1040400001 its reverse (1000040401), we get a palindrome (2040440402).

The spelling of 1040400001 in words is "one billion, forty million, four hundred thousand, one".