42519877 has 2 divisors, whose sum is σ = 42519878. Its totient is φ = 42519876.

The previous prime is 42519863. The next prime is 42519923. The reversal of 42519877 is 77891524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36978561 + 5541316 = 6081^2 + 2354^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42519877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42519857) 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, 21259938 + 21259939.

It is an arithmetic number, because the mean of its divisors is an integer number (21259939).

Almost surely, 2^42519877 is an apocalyptic number.

It is an amenable number.

42519877 is a deficient number, since it is larger than the sum of its proper divisors (1).

42519877 is an equidigital number, since it uses as much as digits as its factorization.

42519877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 43.

The square root of 42519877 is about 6520.7267233032. The cubic root of 42519877 is about 349.0309986341.

It can be divided in two parts, 425 and 19877, that added together give a palindrome (20302).

The spelling of 42519877 in words is "forty-two million, five hundred nineteen thousand, eight hundred seventy-seven".