34871721 has 16 divisors (see below), whose sum is σ = 48055680. Its totient is φ = 22480640.

The previous prime is 34871719. The next prime is 34871729. The reversal of 34871721 is 12717843.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 34871721 - 2¹ = 34871719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (34871729) 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, 9745 + ... + 12833.

It is an arithmetic number, because the mean of its divisors is an integer number (3003480).

Almost surely, 2^34871721 is an apocalyptic number.

It is an amenable number.

34871721 is a deficient number, since it is larger than the sum of its proper divisors (13183959).

34871721 is a wasteful number, since it uses less digits than its factorization.

34871721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216.

The product of its digits is 9408, while the sum is 33.

The square root of 34871721 is about 5905.2282767053. The cubic root of 34871721 is about 326.7065140664.

The spelling of 34871721 in words is "thirty-four million, eight hundred seventy-one thousand, seven hundred twenty-one".