1045520521 has 2 divisors, whose sum is σ = 1045520522. Its totient is φ = 1045520520.

The previous prime is 1045520513. The next prime is 1045520537. The reversal of 1045520521 is 1250255401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 624450121 + 421070400 = 24989^2 + 20520^2 .

It is a cyclic number.

It is not a de Polignac number, because 1045520521 - 2³ = 1045520513 is a prime.

It is a super-2 number, since 2×1045520521² = 2186226319664222882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1045520561) 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 as a sum of consecutive naturals, namely, 522760260 + 522760261.

It is an arithmetic number, because the mean of its divisors is an integer number (522760261).

Almost surely, 2^1045520521 is an apocalyptic number.

It is an amenable number.

1045520521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1045520521 is an equidigital number, since it uses as much as digits as its factorization.

1045520521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1045520521 is about 32334.5097535126. The cubic root of 1045520521 is about 1014.9489231499.

Adding to 1045520521 its reverse (1250255401), we get a palindrome (2295775922).

It can be divided in two parts, 10455 and 20521, that added together give a square (30976 = 176²).

The spelling of 1045520521 in words is "one billion, forty-five million, five hundred twenty thousand, five hundred twenty-one".