1001025099 has 6 divisors (see below), whose sum is σ = 1445925156. Its totient is φ = 667350060.

The previous prime is 1001025083. The next prime is 1001025131. The reversal of 1001025099 is 9905201001.

It is a happy number.

It is not a de Polignac number, because 1001025099 - 2⁴ = 1001025083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001025299) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55612497 + ... + 55612514.

It is an arithmetic number, because the mean of its divisors is an integer number (240987526).

Almost surely, 2^1001025099 is an apocalyptic number.

1001025099 is a deficient number, since it is larger than the sum of its proper divisors (444900057).

1001025099 is a wasteful number, since it uses less digits than its factorization.

1001025099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111225017 (or 111225014 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 1001025099 is about 31638.9806883850. The cubic root of 1001025099 is about 1000.3415829745.

The spelling of 1001025099 in words is "one billion, one million, twenty-five thousand, ninety-nine".