67204621 has 16 divisors (see below), whose sum is σ = 80137728. Its totient is φ = 55641600.

The previous prime is 67204619. The next prime is 67204637. The reversal of 67204621 is 12640276.

67204621 is a nontrivial binomial coefficient, being equal to C(11594, 2).

It is a 5-Lehmer number, since φ(67204621) divides (67204621-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 67204621 - 2¹ = 67204619 is a prime.

It is a super-2 number, since 2×67204621² = 9032922167507282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 67204621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67204601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1 + ... + 11593.

It is an arithmetic number, because the mean of its divisors is an integer number (5008608).

Almost surely, 2^67204621 is an apocalyptic number.

67204621 is the 11593-rd triangular number and also the 5797-th hexagonal number.

67204621 is the 3865-th centered nonagonal number.

It is an amenable number.

67204621 is a deficient number, since it is larger than the sum of its proper divisors (12933107).

67204621 is a wasteful number, since it uses less digits than its factorization.

67204621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11652.

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

The square root of 67204621 is about 8197.8424600623. The cubic root of 67204621 is about 406.5678614956.

Adding to 67204621 its reverse (12640276), we get a palindrome (79844897).

The spelling of 67204621 in words is "sixty-seven million, two hundred four thousand, six hundred twenty-one".