1001315642 has 4 divisors (see below), whose sum is σ = 1501973466. Its totient is φ = 500657820.

The previous prime is 1001315641. The next prime is 1001315659. The reversal of 1001315642 is 2465131001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2465131001 = 9803 ⋅251467.

It can be written as a sum of positive squares in only one way, i.e., 957345481 + 43970161 = 30941^2 + 6631^2 .

It is not an unprimeable number, because it can be changed into a prime (1001315641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250328909 + ... + 250328912.

Almost surely, 2^1001315642 is an apocalyptic number.

1001315642 is a deficient number, since it is larger than the sum of its proper divisors (500657824).

1001315642 is an equidigital number, since it uses as much as digits as its factorization.

1001315642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500657823.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1001315642 is about 31643.5718906700. The cubic root of 1001315642 is about 1000.4383551500.

Adding to 1001315642 its reverse (2465131001), we get a palindrome (3466446643).

The spelling of 1001315642 in words is "one billion, one million, three hundred fifteen thousand, six hundred forty-two".