1258228522 has 4 divisors (see below), whose sum is σ = 1887342786. Its totient is φ = 629114260.

The previous prime is 1258228453. The next prime is 1258228523. The reversal of 1258228522 is 2258228521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2258228521 = 29 ⋅77869949.

It can be written as a sum of positive squares in only one way, i.e., 1048529161 + 209699361 = 32381^2 + 14481^2 .

It is not an unprimeable number, because it can be changed into a prime (1258228523) 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 as a sum of consecutive naturals, namely, 314557129 + ... + 314557132.

Almost surely, 2^1258228522 is an apocalyptic number.

1258228522 is a deficient number, since it is larger than the sum of its proper divisors (629114264).

1258228522 is an equidigital number, since it uses as much as digits as its factorization.

1258228522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629114263.

The product of its digits is 51200, while the sum is 37.

The square root of 1258228522 is about 35471.5170524183. The cubic root of 1258228522 is about 1079.5758857133.

Subtracting 1258228522 from its reverse (2258228521), we obtain a palindrome (999999999).

The spelling of 1258228522 in words is "one billion, two hundred fifty-eight million, two hundred twenty-eight thousand, five hundred twenty-two".