1001054521 has 4 divisors (see below), whose sum is σ = 1001744932. Its totient is φ = 1000364112.

The previous prime is 1001054497. The next prime is 1001054581. The reversal of 1001054521 is 1254501001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1254501001 = 13 ⋅96500077.

It can be written as a sum of positive squares in 2 ways, for example, as 730945296 + 270109225 = 27036^2 + 16435^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001054521 - 2⁹ = 1001054009 is a prime.

It is a super-2 number, since 2×1001054521² = 2004220308029078882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001054581) 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, 343026 + ... + 345931.

It is an arithmetic number, because the mean of its divisors is an integer number (250436233).

Almost surely, 2^1001054521 is an apocalyptic number.

It is an amenable number.

1001054521 is a deficient number, since it is larger than the sum of its proper divisors (690411).

1001054521 is an equidigital number, since it uses as much as digits as its factorization.

1001054521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690410.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1001054521 is about 31639.4456493789. The cubic root of 1001054521 is about 1000.3513835152.

Adding to 1001054521 its reverse (1254501001), we get a palindrome (2255555522).

The spelling of 1001054521 in words is "one billion, one million, fifty-four thousand, five hundred twenty-one".