34142021 has 4 divisors (see below), whose sum is σ = 34155852. Its totient is φ = 34128192.

The previous prime is 34141997. The next prime is 34142029. The reversal of 34142021 is 12024143.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33062500 + 1079521 = 5750^2 + 1039^2 .

It is a cyclic number.

It is not a de Polignac number, because 34142021 - 2¹⁸ = 33879877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34142029) 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, 2090 + ... + 8523.

It is an arithmetic number, because the mean of its divisors is an integer number (8538963).

Almost surely, 2^34142021 is an apocalyptic number.

It is an amenable number.

34142021 is a deficient number, since it is larger than the sum of its proper divisors (13831).

34142021 is a wasteful number, since it uses less digits than its factorization.

34142021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13830.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 34142021 is about 5843.1174042629. The cubic root of 34142021 is about 324.4116250041.

Adding to 34142021 its reverse (12024143), we get a palindrome (46166164).

The spelling of 34142021 in words is "thirty-four million, one hundred forty-two thousand, twenty-one".