1252230521 has 4 divisors (see below), whose sum is σ = 1265140212. Its totient is φ = 1239320832.

The previous prime is 1252230493. The next prime is 1252230533. The reversal of 1252230521 is 1250322521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1250322521 = 7 ⋅178617503.

It can be written as a sum of positive squares in 2 ways, for example, as 497959225 + 754271296 = 22315^2 + 27464^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252230521 - 2¹⁰ = 1252229497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1252232521) 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, 6454700 + ... + 6454893.

It is an arithmetic number, because the mean of its divisors is an integer number (316285053).

Almost surely, 2^1252230521 is an apocalyptic number.

It is an amenable number.

1252230521 is a deficient number, since it is larger than the sum of its proper divisors (12909691).

1252230521 is an equidigital number, since it uses as much as digits as its factorization.

1252230521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12909690.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1252230521 is about 35386.8693303039. The cubic root of 1252230521 is about 1077.8576991898.

The spelling of 1252230521 in words is "one billion, two hundred fifty-two million, two hundred thirty thousand, five hundred twenty-one".