30081261 has 8 divisors (see below), whose sum is σ = 45838144. Its totient is φ = 17189280.

The previous prime is 30081241. The next prime is 30081277. The reversal of 30081261 is 16218003.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30081261 - 2⁵ = 30081229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1432441 = 30081261 / (3 + 0 + 0 + 8 + 1 + 2 + 6 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30081221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 716200 + ... + 716241.

It is an arithmetic number, because the mean of its divisors is an integer number (5729768).

Almost surely, 2^30081261 is an apocalyptic number.

It is an amenable number.

30081261 is a deficient number, since it is larger than the sum of its proper divisors (15756883).

30081261 is a wasteful number, since it uses less digits than its factorization.

30081261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432451.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 30081261 is about 5484.6386389625. The cubic root of 30081261 is about 311.0035496884.

Adding to 30081261 its reverse (16218003), we get a palindrome (46299264).

The spelling of 30081261 in words is "thirty million, eighty-one thousand, two hundred sixty-one".