42780671 has 8 divisors (see below), whose sum is σ = 44262288. Its totient is φ = 41320000.

The previous prime is 42780659. The next prime is 42780697. The reversal of 42780671 is 17608724.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42780671 - 2¹⁴ = 42764287 is a prime.

It is a super-2 number, since 2×42780671² = 3660371622420482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42780601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1025 + ... + 9306.

It is an arithmetic number, because the mean of its divisors is an integer number (5532786).

Almost surely, 2^42780671 is an apocalyptic number.

42780671 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

42780671 is a deficient number, since it is larger than the sum of its proper divisors (1481617).

42780671 is a wasteful number, since it uses less digits than its factorization.

42780671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10473.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 42780671 is about 6540.6934647635. The cubic root of 42780671 is about 349.7431339804.

The spelling of 42780671 in words is "forty-two million, seven hundred eighty thousand, six hundred seventy-one".