542521125257 has 2 divisors, whose sum is σ = 542521125258. Its totient is φ = 542521125256.

The previous prime is 542521125199. The next prime is 542521125259. The reversal of 542521125257 is 752521125245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 541962464761 + 558660496 = 736181^2 + 23636^2 .

It is a cyclic number.

It is not a de Polignac number, because 542521125257 - 2¹⁴ = 542521108873 is a prime.

Together with 542521125259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (542521125259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271260562628 + 271260562629.

It is an arithmetic number, because the mean of its divisors is an integer number (271260562629).

Almost surely, 2^542521125257 is an apocalyptic number.

It is an amenable number.

542521125257 is a deficient number, since it is larger than the sum of its proper divisors (1).

542521125257 is an equidigital number, since it uses as much as digits as its factorization.

542521125257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 280000, while the sum is 41.

The spelling of 542521125257 in words is "five hundred forty-two billion, five hundred twenty-one million, one hundred twenty-five thousand, two hundred fifty-seven".