1001145399 has 4 divisors (see below), whose sum is σ = 1334860536. Its totient is φ = 667430264.

The previous prime is 1001145391. The next prime is 1001145401. The reversal of 1001145399 is 9935411001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1001145399 - 2³ = 1001145391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001145391) 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, 166857564 + ... + 166857569.

It is an arithmetic number, because the mean of its divisors is an integer number (333715134).

Almost surely, 2^1001145399 is an apocalyptic number.

1001145399 is a deficient number, since it is larger than the sum of its proper divisors (333715137).

1001145399 is an equidigital number, since it uses as much as digits as its factorization.

1001145399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333715136.

The product of its (nonzero) digits is 4860, while the sum is 33.

The square root of 1001145399 is about 31640.8817671063. The cubic root of 1001145399 is about 1000.3816539884.

The spelling of 1001145399 in words is "one billion, one million, one hundred forty-five thousand, three hundred ninety-nine".