42387403 has 4 divisors (see below), whose sum is σ = 42421528. Its totient is φ = 42353280.

The previous prime is 42387391. The next prime is 42387419. The reversal of 42387403 is 30478324.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42387403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42387463) 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, 15126 + ... + 17707.

It is an arithmetic number, because the mean of its divisors is an integer number (10605382).

Almost surely, 2^42387403 is an apocalyptic number.

42387403 is a deficient number, since it is larger than the sum of its proper divisors (34125).

42387403 is a wasteful number, since it uses less digits than its factorization.

42387403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34124.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 42387403 is about 6510.5608821360. The cubic root of 42387403 is about 348.6681437534.

The spelling of 42387403 in words is "forty-two million, three hundred eighty-seven thousand, four hundred three".