340002021 has 4 divisors (see below), whose sum is σ = 453336032. Its totient is φ = 226668012.

The previous prime is 340002011. The next prime is 340002041. The reversal of 340002021 is 120200043.

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 not a de Polignac number, because 340002021 - 2⁹ = 340001509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 340001988 and 340002006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340002011) 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, 56667001 + ... + 56667006.

It is an arithmetic number, because the mean of its divisors is an integer number (113334008).

Almost surely, 2^340002021 is an apocalyptic number.

It is an amenable number.

340002021 is a deficient number, since it is larger than the sum of its proper divisors (113334011).

340002021 is a wasteful number, since it uses less digits than its factorization.

340002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113334010.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 340002021 is about 18439.1437165612. The cubic root of 340002021 is about 697.9545875935.

Adding to 340002021 its reverse (120200043), we get a palindrome (460202064).

The spelling of 340002021 in words is "three hundred forty million, two thousand, twenty-one".