42378671 has 6 divisors (see below), whose sum is σ = 45018480. Its totient is φ = 39885536.

The previous prime is 42378667. The next prime is 42378703. The reversal of 42378671 is 17687324.

It is not a de Polignac number, because 42378671 - 2² = 42378667 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42378571) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73031 + ... + 73608.

It is an arithmetic number, because the mean of its divisors is an integer number (7503080).

Almost surely, 2^42378671 is an apocalyptic number.

42378671 is a deficient number, since it is larger than the sum of its proper divisors (2639809).

42378671 is a wasteful number, since it uses less digits than its factorization.

42378671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146673 (or 146656 counting only the distinct ones).

The product of its digits is 56448, while the sum is 38.

The square root of 42378671 is about 6509.8902448505. The cubic root of 42378671 is about 348.6441996953.

The spelling of 42378671 in words is "forty-two million, three hundred seventy-eight thousand, six hundred seventy-one".