1258236641 has 2 divisors, whose sum is σ = 1258236642. Its totient is φ = 1258236640.

The previous prime is 1258236619. The next prime is 1258236667. The reversal of 1258236641 is 1466328521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1215986641 + 42250000 = 34871^2 + 6500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1258236641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1258236595 and 1258236604.

It is not a weakly prime, because it can be changed into another prime (1258236041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629118320 + 629118321.

It is an arithmetic number, because the mean of its divisors is an integer number (629118321).

Almost surely, 2^1258236641 is an apocalyptic number.

It is an amenable number.

1258236641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1258236641 is an equidigital number, since it uses as much as digits as its factorization.

1258236641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 38.

The square root of 1258236641 is about 35471.6314961689. The cubic root of 1258236641 is about 1079.5782077763.

The spelling of 1258236641 in words is "one billion, two hundred fifty-eight million, two hundred thirty-six thousand, six hundred forty-one".