42727481 has 2 divisors, whose sum is σ = 42727482. Its totient is φ = 42727480.

The previous prime is 42727463. The next prime is 42727483. The reversal of 42727481 is 18472724.

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., 42250000 + 477481 = 6500^2 + 691^2 .

It is a cyclic number.

It is not a de Polignac number, because 42727481 - 2⁶ = 42727417 is a prime.

It is a super-2 number, since 2×42727481² = 3651275265210722, which contains 22 as substring.

Together with 42727483, 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 (42727483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21363740 + 21363741.

It is an arithmetic number, because the mean of its divisors is an integer number (21363741).

Almost surely, 2^42727481 is an apocalyptic number.

It is an amenable number.

42727481 is a deficient number, since it is larger than the sum of its proper divisors (1).

42727481 is an equidigital number, since it uses as much as digits as its factorization.

42727481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25088, while the sum is 35.

The square root of 42727481 is about 6536.6261175013. The cubic root of 42727481 is about 349.5981264965.

The spelling of 42727481 in words is "forty-two million, seven hundred twenty-seven thousand, four hundred eighty-one".