73142557 has 2 divisors, whose sum is σ = 73142558. Its totient is φ = 73142556.

The previous prime is 73142543. The next prime is 73142579. The reversal of 73142557 is 75524137.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39803481 + 33339076 = 6309^2 + 5774^2 .

It is a cyclic number.

It is not a de Polignac number, because 73142557 - 2¹⁵ = 73109789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73143557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36571278 + 36571279.

It is an arithmetic number, because the mean of its divisors is an integer number (36571279).

Almost surely, 2^73142557 is an apocalyptic number.

It is an amenable number.

73142557 is a deficient number, since it is larger than the sum of its proper divisors (1).

73142557 is an equidigital number, since it uses as much as digits as its factorization.

73142557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29400, while the sum is 34.

The square root of 73142557 is about 8552.3421938087. The cubic root of 73142557 is about 418.2057948202.

The spelling of 73142557 in words is "seventy-three million, one hundred forty-two thousand, five hundred fifty-seven".