42490477 has 2 divisors, whose sum is σ = 42490478. Its totient is φ = 42490476.

The previous prime is 42490421. The next prime is 42490501. The reversal of 42490477 is 77409424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37711881 + 4778596 = 6141^2 + 2186^2 .

It is a cyclic number.

It is not a de Polignac number, because 42490477 - 2¹⁹ = 41966189 is a prime.

It is equal to p_2575657 and since 42490477 and 2575657 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42490417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21245238 + 21245239.

It is an arithmetic number, because the mean of its divisors is an integer number (21245239).

Almost surely, 2^42490477 is an apocalyptic number.

It is an amenable number.

42490477 is a deficient number, since it is larger than the sum of its proper divisors (1).

42490477 is an equidigital number, since it uses as much as digits as its factorization.

42490477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 42490477 is about 6518.4719835250. The cubic root of 42490477 is about 348.9505352675.

The spelling of 42490477 in words is "forty-two million, four hundred ninety thousand, four hundred seventy-seven".