67042621 has 4 divisors (see below), whose sum is σ = 70571200. Its totient is φ = 63514044.

The previous prime is 67042609. The next prime is 67042627. The reversal of 67042621 is 12624076.

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 67042621 - 2⁵ = 67042589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67042621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67042627) 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, 1764261 + ... + 1764298.

It is an arithmetic number, because the mean of its divisors is an integer number (17642800).

Almost surely, 2^67042621 is an apocalyptic number.

It is an amenable number.

67042621 is a deficient number, since it is larger than the sum of its proper divisors (3528579).

67042621 is a wasteful number, since it uses less digits than its factorization.

67042621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3528578.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 67042621 is about 8187.9558499054. The cubic root of 67042621 is about 406.2409147949.

Adding to 67042621 its reverse (12624076), we get a palindrome (79666697).

The spelling of 67042621 in words is "sixty-seven million, forty-two thousand, six hundred twenty-one".