67242381 has 4 divisors (see below), whose sum is σ = 89656512. Its totient is φ = 44828252.

The previous prime is 67242353. The next prime is 67242389. The reversal of 67242381 is 18324276.

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 a cyclic number.

It is not a de Polignac number, because 67242381 - 2¹⁵ = 67209613 is a prime.

It is a super-2 number, since 2×67242381² = 9043075605098322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67242389) 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, 11207061 + ... + 11207066.

It is an arithmetic number, because the mean of its divisors is an integer number (22414128).

Almost surely, 2^67242381 is an apocalyptic number.

It is an amenable number.

67242381 is a deficient number, since it is larger than the sum of its proper divisors (22414131).

67242381 is a wasteful number, since it uses less digits than its factorization.

67242381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22414130.

The product of its digits is 16128, while the sum is 33.

The square root of 67242381 is about 8200.1451816416. The cubic root of 67242381 is about 406.6439928085.

The spelling of 67242381 in words is "sixty-seven million, two hundred forty-two thousand, three hundred eighty-one".