34040021 has 4 divisors (see below), whose sum is σ = 34135200. Its totient is φ = 33944844.

The previous prime is 34040009. The next prime is 34040057. The reversal of 34040021 is 12004043.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 34040021 - 2¹⁴ = 34023637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 34039978 and 34040005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34040521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47051 + ... + 47768.

It is an arithmetic number, because the mean of its divisors is an integer number (8533800).

Almost surely, 2^34040021 is an apocalyptic number.

It is an amenable number.

34040021 is a deficient number, since it is larger than the sum of its proper divisors (95179).

34040021 is an equidigital number, since it uses as much as digits as its factorization.

34040021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95178.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 34040021 is about 5834.3826580025. The cubic root of 34040021 is about 324.0882405849.

Adding to 34040021 its reverse (12004043), we get a palindrome (46044064).

The spelling of 34040021 in words is "thirty-four million, forty thousand, twenty-one".