1000001145 has 32 divisors (see below), whose sum is σ = 1879726464. Its totient is φ = 447552000.

The previous prime is 1000001137. The next prime is 1000001161. The reversal of 1000001145 is 5411000001.

It is a happy number.

It is not a de Polignac number, because 1000001145 - 2³ = 1000001137 is a prime.

It is a super-2 number, since 2×1000001145² = 2000004580002622050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1000001145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 230956 + ... + 235245.

It is an arithmetic number, because the mean of its divisors is an integer number (58741452).

Almost surely, 2^1000001145 is an apocalyptic number.

1000001145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1000001145 is a deficient number, since it is larger than the sum of its proper divisors (879725319).

1000001145 is a wasteful number, since it uses less digits than its factorization.

1000001145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466233.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 1000001145 is about 31622.7947057182. The cubic root of 1000001145 is about 1000.0003816665. Note that the first 3 decimals are identical.

Adding to 1000001145 its reverse (5411000001), we get a palindrome (6411001146).

The spelling of 1000001145 in words is "one billion, one thousand, one hundred forty-five".