75742081 has 2 divisors, whose sum is σ = 75742082. Its totient is φ = 75742080.

The previous prime is 75742063. The next prime is 75742097. The reversal of 75742081 is 18024757.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53802225 + 21939856 = 7335^2 + 4684^2 .

It is a cyclic number.

It is not a de Polignac number, because 75742081 - 2¹⁷ = 75611009 is a prime.

It is a super-2 number, since 2×75742081² = 11473725668421122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (75742001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37871040 + 37871041.

It is an arithmetic number, because the mean of its divisors is an integer number (37871041).

Almost surely, 2^75742081 is an apocalyptic number.

It is an amenable number.

75742081 is a deficient number, since it is larger than the sum of its proper divisors (1).

75742081 is an equidigital number, since it uses as much as digits as its factorization.

75742081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 75742081 is about 8702.9926462108. The cubic root of 75742081 is about 423.1026489608.

The spelling of 75742081 in words is "seventy-five million, seven hundred forty-two thousand, eighty-one".