1006631545 has 4 divisors (see below), whose sum is σ = 1207957860. Its totient is φ = 805305232.

The previous prime is 1006631543. The next prime is 1006631579. The reversal of 1006631545 is 5451366001.

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 232623504 + 774008041 = 15252^2 + 27821^2 .

It is a cyclic number.

It is not a de Polignac number, because 1006631545 - 2¹ = 1006631543 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1006631543) 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, 100663150 + ... + 100663159.

It is an arithmetic number, because the mean of its divisors is an integer number (301989465).

Almost surely, 2^1006631545 is an apocalyptic number.

It is an amenable number.

1006631545 is a deficient number, since it is larger than the sum of its proper divisors (201326315).

1006631545 is an equidigital number, since it uses as much as digits as its factorization.

1006631545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201326314.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1006631545 is about 31727.4572728418. The cubic root of 1006631545 is about 1002.2056465466.

Adding to 1006631545 its reverse (5451366001), we get a palindrome (6457997546).

The spelling of 1006631545 in words is "one billion, six million, six hundred thirty-one thousand, five hundred forty-five".