1557424541 has 2 divisors, whose sum is σ = 1557424542. Its totient is φ = 1557424540.

The previous prime is 1557424529. The next prime is 1557424543. The reversal of 1557424541 is 1454247551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1009396441 + 548028100 = 31771^2 + 23410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1557424541 is a prime.

Together with 1557424543, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1557424495 and 1557424504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1557424543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 778712270 + 778712271.

It is an arithmetic number, because the mean of its divisors is an integer number (778712271).

Almost surely, 2^1557424541 is an apocalyptic number.

It is an amenable number.

1557424541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1557424541 is an equidigital number, since it uses as much as digits as its factorization.

1557424541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112000, while the sum is 38.

The square root of 1557424541 is about 39464.2184896648. The cubic root of 1557424541 is about 1159.1394085136.

The spelling of 1557424541 in words is "one billion, five hundred fifty-seven million, four hundred twenty-four thousand, five hundred forty-one".