1001659201 has 3 divisors (see below), whose sum is σ = 1001690851. Its totient is φ = 1001627552.

The previous prime is 1001659171. The next prime is 1001659229. The reversal of 1001659201 is 1029561001.

The square root of 1001659201 is 31649.

It is a perfect power (a square), and thus also a powerful number.

1001659201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 876219201 + 125440000 = 29601^2 + 11200^2 .

It is not a de Polignac number, because 1001659201 - 2¹³ = 1001651009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001059201) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15825 + ... + 47473.

Almost surely, 2^1001659201 is an apocalyptic number.

1001659201 is the 31649-th square number.

1001659201 is the 15825-th centered octagonal number.

It is an amenable number.

1001659201 is a deficient number, since it is larger than the sum of its proper divisors (31650).

1001659201 is an frugal number, since it uses more digits than its factorization.

1001659201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63298 (or 31649 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 25.

The cubic root of 1001659201 is about 1000.5527613985.

Multiplying 1001659201 by its sum of digits (25), we get a square (25041480025 = 158245²).

The spelling of 1001659201 in words is "one billion, one million, six hundred fifty-nine thousand, two hundred one".