42417381 has 4 divisors (see below), whose sum is σ = 56556512. Its totient is φ = 28278252.

The previous prime is 42417371. The next prime is 42417383. The reversal of 42417381 is 18371424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42417381 - 2²¹ = 40320229 is a prime.

It is a super-2 number, since 2×42417381² = 3598468421798322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42417383) 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, 7069561 + ... + 7069566.

It is an arithmetic number, because the mean of its divisors is an integer number (14139128).

Almost surely, 2^42417381 is an apocalyptic number.

It is an amenable number.

42417381 is a deficient number, since it is larger than the sum of its proper divisors (14139131).

42417381 is a wasteful number, since it uses less digits than its factorization.

42417381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14139130.

The product of its digits is 5376, while the sum is 30.

The square root of 42417381 is about 6512.8627346199. The cubic root of 42417381 is about 348.7503215526.

The spelling of 42417381 in words is "forty-two million, four hundred seventeen thousand, three hundred eighty-one".