42481391 has 8 divisors (see below), whose sum is σ = 44828640. Its totient is φ = 40175872.

The previous prime is 42481363. The next prime is 42481393. The reversal of 42481391 is 19318424.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42481391 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 (42481393) 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, 8330 + ... + 12423.

It is an arithmetic number, because the mean of its divisors is an integer number (5603580).

Almost surely, 2^42481391 is an apocalyptic number.

42481391 is a deficient number, since it is larger than the sum of its proper divisors (2347249).

42481391 is a wasteful number, since it uses less digits than its factorization.

42481391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20865.

The product of its digits is 6912, while the sum is 32.

The square root of 42481391 is about 6517.7750037877. The cubic root of 42481391 is about 348.9256607481.

The spelling of 42481391 in words is "forty-two million, four hundred eighty-one thousand, three hundred ninety-one".