542178557 has 2 divisors, whose sum is σ = 542178558. Its totient is φ = 542178556.

The previous prime is 542178551. The next prime is 542178601. The reversal of 542178557 is 755871245.

It is an a-pointer prime, because the next prime (542178601) can be obtained adding 542178557 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 348718276 + 193460281 = 18674^2 + 13909^2 .

It is a cyclic number.

It is not a de Polignac number, because 542178557 - 2¹² = 542174461 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542178551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271089278 + 271089279.

It is an arithmetic number, because the mean of its divisors is an integer number (271089279).

Almost surely, 2^542178557 is an apocalyptic number.

It is an amenable number.

542178557 is a deficient number, since it is larger than the sum of its proper divisors (1).

542178557 is an equidigital number, since it uses as much as digits as its factorization.

542178557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 392000, while the sum is 44.

The square root of 542178557 is about 23284.7279777969. The cubic root of 542178557 is about 815.4189106918.

The spelling of 542178557 in words is "five hundred forty-two million, one hundred seventy-eight thousand, five hundred fifty-seven".