42404377 has 4 divisors (see below), whose sum is σ = 42714036. Its totient is φ = 42094720.

The previous prime is 42404363. The next prime is 42404419. The reversal of 42404377 is 77340424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22477081 + 19927296 = 4741^2 + 4464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42404377 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42404977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154624 + ... + 154897.

It is an arithmetic number, because the mean of its divisors is an integer number (10678509).

Almost surely, 2^42404377 is an apocalyptic number.

It is an amenable number.

42404377 is a deficient number, since it is larger than the sum of its proper divisors (309659).

42404377 is a wasteful number, since it uses less digits than its factorization.

42404377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309658.

The product of its (nonzero) digits is 18816, while the sum is 31.

The square root of 42404377 is about 6511.8643259822. The cubic root of 42404377 is about 348.7146788310.

The spelling of 42404377 in words is "forty-two million, four hundred four thousand, three hundred seventy-seven".