42603381 has 8 divisors (see below), whose sum is σ = 63116160. Its totient is φ = 28402236.

The previous prime is 42603367. The next prime is 42603397. The reversal of 42603381 is 18330624.

It is a happy number.

It is not a de Polignac number, because 42603381 - 2¹⁴ = 42586997 is a prime.

It is a super-2 number, since 2×42603381² = 3630096145262322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1577903 = 42603381 / (4 + 2 + 6 + 0 + 3 + 3 + 8 + 1).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42603181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 788925 + ... + 788978.

It is an arithmetic number, because the mean of its divisors is an integer number (7889520).

Almost surely, 2^42603381 is an apocalyptic number.

It is an amenable number.

42603381 is a deficient number, since it is larger than the sum of its proper divisors (20512779).

42603381 is a wasteful number, since it uses less digits than its factorization.

42603381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577912 (or 1577906 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 42603381 is about 6527.1265500218. The cubic root of 42603381 is about 349.2593343987.

The spelling of 42603381 in words is "forty-two million, six hundred three thousand, three hundred eighty-one".