999201457 has 4 divisors (see below), whose sum is σ = 1001427300.
Its totient is φ = 996975616.
The previous prime is 999201439. The next prime is 999201461. The reversal of 999201457 is 754102999.
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 347114161 + 652087296 = 18631^2 + 25536^2
It is a cyclic number.
It is not a de Polignac number, because 999201457 - 227 = 864983729 is a prime.
It is a pancake number, because a pancake can be divided into 999201457 parts by 44703 straight cuts.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (999201407) 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 3 ways as a sum of consecutive naturals, for example, 1112248 + ... + 1113145.
It is an arithmetic number, because the mean of its divisors is an integer number (250356825).
Almost surely, 2999201457 is an apocalyptic number.
It is an amenable number.
999201457 is a deficient number, since it is larger than the sum of its proper divisors (2225843).
999201457 is a wasteful number, since it uses less digits than its factorization.
999201457 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2225842.
The product of its (nonzero) digits is 204120, while the sum is 46.
The square root of 999201457 is about 31610.1480066133.
The cubic root of 999201457 is about 999.7337481162.
The spelling of 999201457 in words is "nine hundred ninety-nine million, two hundred one thousand, four hundred fifty-seven".