1000004945 has 4 divisors (see below), whose sum is σ = 1200005940. Its totient is φ = 800003952.

The previous prime is 1000004933. The next prime is 1000004977. The reversal of 1000004945 is 5494000001.

It is a happy number.

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 164968336 + 835036609 = 12844^2 + 28897^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000004945 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1000004945.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100000490 + ... + 100000499.

It is an arithmetic number, because the mean of its divisors is an integer number (300001485).

Almost surely, 2^1000004945 is an apocalyptic number.

It is an amenable number.

1000004945 is a deficient number, since it is larger than the sum of its proper divisors (200000995).

1000004945 is an equidigital number, since it uses as much as digits as its factorization.

1000004945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200000994.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1000004945 is about 31622.8547889023. The cubic root of 1000004945 is about 1000.0016483306.

Adding to 1000004945 its reverse (5494000001), we get a palindrome (6494004946).

The spelling of 1000004945 in words is "one billion, four thousand, nine hundred forty-five".