61365321 has 12 divisors (see below), whose sum is σ = 88750272. Its totient is φ = 40858776.

The previous prime is 61365313. The next prime is 61365323. The reversal of 61365321 is 12356316.

61365321 is a `hidden beast` number, since 6 + 1 + 3 + 653 + 2 + 1 = 666.

It is not a de Polignac number, because 61365321 - 2³ = 61365313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61365323) 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, 4140 + ... + 11826.

It is an arithmetic number, because the mean of its divisors is an integer number (7395856).

Almost surely, 2^61365321 is an apocalyptic number.

It is an amenable number.

61365321 is a deficient number, since it is larger than the sum of its proper divisors (27384951).

61365321 is a wasteful number, since it uses less digits than its factorization.

61365321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8580 (or 8577 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 61365321 is about 7833.6020450365. The cubic root of 61365321 is about 394.4339935926.

The spelling of 61365321 in words is "sixty-one million, three hundred sixty-five thousand, three hundred twenty-one".