1000554521 has 4 divisors (see below), whose sum is σ = 1000740132. Its totient is φ = 1000368912.

The previous prime is 1000554517. The next prime is 1000554547. The reversal of 1000554521 is 1254550001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1254550001 = 6827 ⋅183763.

It can be written as a sum of positive squares in 2 ways, for example, as 916575625 + 83978896 = 30275^2 + 9164^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000554521 - 2² = 1000554517 is a prime.

It is a super-2 number, since 2×1000554521² = 2002218698987078882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000557521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84470 + ... + 95583.

It is an arithmetic number, because the mean of its divisors is an integer number (250185033).

Almost surely, 2^1000554521 is an apocalyptic number.

It is an amenable number.

1000554521 is a deficient number, since it is larger than the sum of its proper divisors (185611).

1000554521 is an equidigital number, since it uses as much as digits as its factorization.

1000554521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185610.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 1000554521 is about 31631.5431333977. The cubic root of 1000554521 is about 1000.1848061779.

The spelling of 1000554521 in words is "one billion, five hundred fifty-four thousand, five hundred twenty-one".