1257229528441 has 2 divisors, whose sum is σ = 1257229528442. Its totient is φ = 1257229528440.

The previous prime is 1257229528339. The next prime is 1257229528507. The reversal of 1257229528441 is 1448259227521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 903585226041 + 353644302400 = 950571^2 + 594680^2 .

It is an emirp because it is prime and its reverse (1448259227521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1257229528441 - 2¹³ = 1257229520249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1257229523441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628614764220 + 628614764221.

It is an arithmetic number, because the mean of its divisors is an integer number (628614764221).

Almost surely, 2^{1257229528441} is an apocalyptic number.

It is an amenable number.

1257229528441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1257229528441 is an equidigital number, since it uses as much as digits as its factorization.

1257229528441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3225600, while the sum is 52.

The spelling of 1257229528441 in words is "one trillion, two hundred fifty-seven billion, two hundred twenty-nine million, five hundred twenty-eight thousand, four hundred forty-one".