1000401287 has 2 divisors, whose sum is σ = 1000401288. Its totient is φ = 1000401286.

The previous prime is 1000401277. The next prime is 1000401323. The reversal of 1000401287 is 7821040001.

It is a weak prime.

It is an emirp because it is prime and its reverse (7821040001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000401287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000401257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500200643 + 500200644.

It is an arithmetic number, because the mean of its divisors is an integer number (500200644).

Almost surely, 2^1000401287 is an apocalyptic number.

1000401287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000401287 is an equidigital number, since it uses as much as digits as its factorization.

1000401287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 1000401287 is about 31629.1208698566. The cubic root of 1000401287 is about 1000.1337444450.

Adding to 1000401287 its reverse (7821040001), we get a palindrome (8821441288).

The spelling of 1000401287 in words is "one billion, four hundred one thousand, two hundred eighty-seven".