1258298729 has 2 divisors, whose sum is σ = 1258298730. Its totient is φ = 1258298728.

The previous prime is 1258298683. The next prime is 1258298747. The reversal of 1258298729 is 9278928521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1243267600 + 15031129 = 35260^2 + 3877^2 .

It is a cyclic number.

It is not a de Polignac number, because 1258298729 - 2²⁴ = 1241521513 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1258298929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629149364 + 629149365.

It is an arithmetic number, because the mean of its divisors is an integer number (629149365).

Almost surely, 2^1258298729 is an apocalyptic number.

It is an amenable number.

1258298729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1258298729 is an equidigital number, since it uses as much as digits as its factorization.

1258298729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 53.

The square root of 1258298729 is about 35472.5066636120. The cubic root of 1258298729 is about 1079.5959648360.

The spelling of 1258298729 in words is "one billion, two hundred fifty-eight million, two hundred ninety-eight thousand, seven hundred twenty-nine".