1258248221 has 8 divisors (see below), whose sum is σ = 1306596984. Its totient is φ = 1210740480.

The previous prime is 1258248209. The next prime is 1258248239. The reversal of 1258248221 is 1228428521.

It can be written as a sum of positive squares in 4 ways, for example, as 30096196 + 1228152025 = 5486^2 + 35045^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1258248221 - 2⁶ = 1258248157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1258248521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207206 + ... + 213191.

It is an arithmetic number, because the mean of its divisors is an integer number (163324623).

Almost surely, 2^1258248221 is an apocalyptic number.

It is an amenable number.

1258248221 is a deficient number, since it is larger than the sum of its proper divisors (48348763).

1258248221 is an equidigital number, since it uses as much as digits as its factorization.

1258248221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420511.

The product of its digits is 20480, while the sum is 35.

The square root of 1258248221 is about 35471.7947248233. The cubic root of 1258248221 is about 1079.5815196804.

The spelling of 1258248221 in words is "one billion, two hundred fifty-eight million, two hundred forty-eight thousand, two hundred twenty-one".