1258738493 has 2 divisors, whose sum is σ = 1258738494. Its totient is φ = 1258738492.

The previous prime is 1258738469. The next prime is 1258738511. The reversal of 1258738493 is 3948378521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1024128004 + 234610489 = 32002^2 + 15317^2 .

It is a cyclic number.

It is not a de Polignac number, because 1258738493 - 2¹⁶ = 1258672957 is a prime.

It is a super-2 number, since 2×1258738493² = 3168845187519822098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1258738433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629369246 + 629369247.

It is an arithmetic number, because the mean of its divisors is an integer number (629369247).

Almost surely, 2^1258738493 is an apocalyptic number.

It is an amenable number.

1258738493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1258738493 is an equidigital number, since it uses as much as digits as its factorization.

1258738493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 50.

The square root of 1258738493 is about 35478.7047818829. The cubic root of 1258738493 is about 1079.7217198550.

The spelling of 1258738493 in words is "one billion, two hundred fifty-eight million, seven hundred thirty-eight thousand, four hundred ninety-three".