34721281 has 8 divisors (see below), whose sum is σ = 40754240. Its totient is φ = 28956528.

The previous prime is 34721263. The next prime is 34721287. The reversal of 34721281 is 18212743.

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

It is a cyclic number.

It is not a de Polignac number, because 34721281 - 2⁵ = 34721249 is a prime.

It is a super-2 number, since 2×34721281² = 2411134708561922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (34721287) 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, 66771 + ... + 67288.

It is an arithmetic number, because the mean of its divisors is an integer number (5094280).

Almost surely, 2^34721281 is an apocalyptic number.

It is an amenable number.

34721281 is a deficient number, since it is larger than the sum of its proper divisors (6032959).

34721281 is a wasteful number, since it uses less digits than its factorization.

34721281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134103.

The product of its digits is 2688, while the sum is 28.

The square root of 34721281 is about 5892.4766439927. The cubic root of 34721281 is about 326.2360222624.

It can be divided in two parts, 3472 and 1281, that added together give a triangular number (4753 = T₉₇).

The spelling of 34721281 in words is "thirty-four million, seven hundred twenty-one thousand, two hundred eighty-one".