67461021 has 12 divisors (see below), whose sum is σ = 98539740. Its totient is φ = 44468160.

The previous prime is 67461007. The next prime is 67461029. The reversal of 67461021 is 12016476.

It can be written as a sum of positive squares in 2 ways, for example, as 46172025 + 21288996 = 6795^2 + 4614^2 .

It is not a de Polignac number, because 67461021 - 2⁶ = 67460957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67461029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41310 + ... + 42911.

It is an arithmetic number, because the mean of its divisors is an integer number (8211645).

Almost surely, 2^67461021 is an apocalyptic number.

It is an amenable number.

67461021 is a deficient number, since it is larger than the sum of its proper divisors (31078719).

67461021 is a wasteful number, since it uses less digits than its factorization.

67461021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84316 (or 84313 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 67461021 is about 8213.4658336174. The cubic root of 67461021 is about 407.0842531136.

Adding to 67461021 its reverse (12016476), we get a palindrome (79477497).

The spelling of 67461021 in words is "sixty-seven million, four hundred sixty-one thousand, twenty-one".