801249999 has 8 divisors (see below), whose sum is σ = 1165454592. Its totient is φ = 485606040.

The previous prime is 801249997. The next prime is 801250027. The reversal of 801249999 is 999942108.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 801249999 - 2¹ = 801249997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801249991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12140119 + ... + 12140184.

It is an arithmetic number, because the mean of its divisors is an integer number (145681824).

Almost surely, 2^801249999 is an apocalyptic number.

801249999 is a deficient number, since it is larger than the sum of its proper divisors (364204593).

801249999 is a wasteful number, since it uses less digits than its factorization.

801249999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24280317.

The product of its (nonzero) digits is 419904, while the sum is 51.

The square root of 801249999 is about 28306.3596917724. The cubic root of 801249999 is about 928.8010135691.

The spelling of 801249999 in words is "eight hundred one million, two hundred forty-nine thousand, nine hundred ninety-nine".