42740377 has 2 divisors, whose sum is σ = 42740378. Its totient is φ = 42740376.

The previous prime is 42740359. The next prime is 42740387. The reversal of 42740377 is 77304724.

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., 35712576 + 7027801 = 5976^2 + 2651^2 .

It is a cyclic number.

It is not a de Polignac number, because 42740377 - 2²³ = 34351769 is a prime.

It is a super-2 number, since 2×42740377² = 3653479652204258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42740387) 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, 21370188 + 21370189.

It is an arithmetic number, because the mean of its divisors is an integer number (21370189).

Almost surely, 2^42740377 is an apocalyptic number.

It is an amenable number.

42740377 is a deficient number, since it is larger than the sum of its proper divisors (1).

42740377 is an equidigital number, since it uses as much as digits as its factorization.

42740377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32928, while the sum is 34.

The square root of 42740377 is about 6537.6124846919. The cubic root of 42740377 is about 349.6332948381.

It can be divided in two parts, 427 and 40377, that added together give a palindrome (40804).

The spelling of 42740377 in words is "forty-two million, seven hundred forty thousand, three hundred seventy-seven".